Not receiving any missions in GTA online PC

Most of the early game missions are triggered by phone calls from Simeon, Lamar, and one of Lamar's friends. These should start up at about level 4. As you level more options in free mode will appear.

I personally had problems with these events triggering automatically on day 1. Day 2 seemed to be better in that regard. Though be weary, there still seems to be issues with the servers not remembering everything you've accomplished.

Long paste, thanks to GTAForums iirc - as of 1.04

If you want to grind, have someone host the job 'Coveted' under missions - 950 RP, $12k payout and is fairly fast once you have it down. As it isn't given by any character, you can Replay it from the post mission menu.

Mission Name / Cash / Rank req. / RP gained - all values on hardmode, solo.

Gerald Trevor's Enigma: 3,500 - 7 - 4,000
Dish the Dirt (1-4): 3,500 - 45 - 2,510
War and Pieces (1-4): 3,500 - 30 - 2,160
Meth'd Up (1-4): 2,500 - 7 - 1,100
No Hay Bronca (1-4): 2,500 - 9 - 1,320
Violent Duct (1-4): 1,500 - 15 - 1,140
Flood in the LS River (1-4): 1,500 - 6 - 1,400
Death Metal (1-4): 1,000 - 6 - 1,320
Chumash and Grab (2-4): 1,000 - 35 - 1,900
Gassed Up (1-4): 1,000 - 12 - 1,050
Pier Pressure (1-4): 750 - 6 - 1,000
Deal Breaker (1-4): 500 - 6 - 1,340

Simeon Blow Up III (1-2): 1,500 - 31 - 1,280
Blow Up II (1-2): 1,500 - 20 - 1,260
Rich Men in Richman (1-4): 1,000 - 5 - 1,100
ATV Steal (1-4): 1,000 - 25 - 1,020
El Burro Heists (1-4): 1,000 - 10 - 1,170
Gentry Does It (1-4): 1,000 - 10 - 1,100
All in the Game (1-2): 1,000 - 10 - 1,060
It Takes a Thief (1-4): 1,000 - 5 - 1,460
Blow Up (1-2): 750 - 12 - 1,650
Rockford Roll (1-2): 750 - 5 - 1,050
Chasers II (1-2): 500 - 16 - 1,060
Chasers (1-2): 500 - 5 - 1,220
Where Credit's Due (1-2): 500 - 5 - 1,050

Lamar Going Down the GOH: 2,500 - 20 - 1,340
No Smoking (1-4): 2,500 - 30 - 1,680
Caught Napping: 2,500 - 20 - 1,450
Lost MC RIP (1-2): 2,500 - 25 - 1,370
San Andreas Seoul: 1,500 - 16 - 1,200
Ticket to Elysium (1-4): 1,500 - 18 - 1,610
Ballas to the Wall (1-2): 500 - 5 - 1,200

Martin Rooftop Rumble (1-4): 12,500 - 75 - 4,350
Defender (1-2): 11,500 - 70 - 3,600
Trash Talk (1-6): 10,000 - 81 - 3,050
Extradition (1-6): 10,000 - 50 - 2,350
Judging the Jury (1-8): 10,000 - 65 - 3,560
Mixed up with Coke (1-6): 9,000 - 45 - 3,350
Dry Docking (1-4): 8,000 - 45 - 2,530
The Los Santos Connection (1-6): 8,000 - 40 - 3,900
Stick Up the Stickup Crew (1-4): 6,000 - 40 - 3,750
Show Me the Monet (1-4): 5,000 - 55 - 2,860
Check Out Time (1-2): 5,000 (car is worth 9,000)* - 35 - 1,110
Grab Your Ballas (1-4): 4,500 - 40 - 2,530
Editor and Thief (1-2): 4,500 - 45 - 1,130
Out of Court Settlement (1-2): 4,500 (car is worth 22,000)* - 22 - 1,160
Holed Up - Burton (1-4): 3,500 - 50 - 2,720
Water the Vineyard (1-2): 2,500 - 40 - 1,720
Death From Above (1-4): 2,500 - 24 - 1,500
Cleaning the Cat House (1-4): 1,500 - 45 - 4,090

Lester Docks to Stock (1-4): 12,500 - 70 - 3,360
Stocks and Scares (1-4): 12,500 - 70 - 4,050
American Exports (1-4): 11,500 - 65 - 3,150
On Maneuvers (1-3): 11,500 - 65 - 2,550
Docks to Stock II (1-4): 10,000 - 75 - 2,850
Chemical Extraction (1-6): 10,000 - 65 - 4,030
Bust Out (1-4): 10,000 - 55 - 1,820
Hack and Dash (1-4): 8,000 - 60 - 1,520
Sinking Feeling (2-4): 7,000 - 55 - 3,000
Quarry Quarry (1-4): 5,000 - 30 - 1,920
Teaser Trailer (1-4): 5,000 - 40 - 2,510
A Titan of a Job (1-6): 5,000 - 24 - 1,000
By Land, Sea, and Air (2-4): 4,500 - 30 - 1,930
Four Trailers (1-6): 3,500 - 45 - 4,000
High Priority Case (1-4): 3,500 - 25 - 1,650
Landing Strip (2-4): 3,500 - 22 - 1,150
Last Chopper Out of LS (2-2): 3,500 - 25 - 1,150
The Parking Garage (2-4): 2,500 - 55 - 4,810
Cop's Capacity (1-2): 2,500 (car is worth 16,000) - 19 - 2,000

Ron Base Invaders (1-4): 12,500 - 27 - 1,460
Landing Gear (4-6): 11,500 - 55 - 2,800
Wet Work (1-4): 7,000 - 55 - 3,650
Crank Up the Volume (1-4): 5,000 - 30 - 1,200
A Boat in the Bay (1-4): 3,500 - 40 - 1,100
Daemon Run (2-4): 2,500 - 25 - 1,500
Turbine Carbine (1-4): 2,500 - 25 - 1,560
Fuelling the Flames (1-4): 2,500 - 20 - 1,270
Romance isn't Dead (1-4): 1,000 - 13 - 1,150

Trevor Chopper Tail (1-4): 11,500 - 70 - 3,450
Method in the Madness (2-4): 11,500 - 65 - 4,670
Satellite Communications: 10,000 - 60 - 4,900
Out of Harmony (1-4): 7,000 - 50 - 2,650
Crystal Clear Out (1-4): 5,000 - 28 - 1,820
Diamonds are for Trevor (1-4): 5,000 - 70 - 3,490
Lost My Mind (1-4): 2,500 - 20 - 1,650