[RPG] Can non-psionic classes use the Autohypnosis skill

Paizo has studiously avoided publishing a single official word on psionics. The only psionics rules are from a third party, Dreamscarred Press, but are in the online Pathfinder SRD. According to those rules, if you are using magic-psionics transparency, then you treat powers just like spells or spell-like abilities, so yes, detect magic would detect and identify them. The question reduces to "How does that work with a spell-like ability?" Transparency means "the same" so yes. Spellcraft would let you ID a power as it was being used; Detect Magic would identify an active power's school (note those are two different things). If you use magic-psi transparency then psi is magic and all the same rules apply.

They include the separate PsiCraft skill because you don't have to use "magic-psionics transparency". That's just the default. A GM could, if they wanted, make them opaque to each other, at which point a Psicraft skill is necessary. Also because some classes might have Psicraft as a class skill that don't have Spellcraft.

Having recently played a Pathfinder one-shot where half of the players were completely new to the system; many of them were confused, including our normal D&D 4E DM. Character creation alone took around an hour and a half due to the wide variety of options. Despite this, once we actually started playing things rolled along decently quickly. Based on this experience, I can certainly recommend a few things to avoid.

Avoid too Many Options

Option paralysis is a very real thing even for experienced players; when someone is just starting out with Pathfinder, they lack the ability to make an assessment of important skills, feats, and variant classes or alternate class features available. I'd recommend letting the players in question choose their race and class and whipping up a set of recommended Feats and Skills they should take to prevent this paralysis; keep the character building aspect simple at first. If you had a lot of time on your hands, you might even make two or three of these recommendation sheets per character and let the player choose between them; this would serve as a simplified introduction to feats and skills. You can do something similar with spells for spellcasters. It's worth stating that these options are important to Pathfinder; it's just important to introduce them slowly. If you wanted to go even further, you could recommended against prepared spellcasters and make them keep to spontaneous spellcasters to keep their options low. I would also recommend against Summon type spells, since they usually require the player to have a detailed knowledge of all the creatures on the Summon List.

Keep it Low Level

No, lower level than even that. I'd recommend starting around level 1 or 2; higher than that, and the feat and spell choices multiply quickly. We all played as Level 4 Monk variants in our one-shot, and feat selection alone took the bulk of our character creation time.

Make sure your Players know what they can do In Play

Depending on familiar your players are with other editions of D&D, many of these concepts might not need to be explained. Other than the obvious attack and damage rolls, make sure fighter-type classes know what their feats actually do; give them a sheet with the descriptions of their feats on it. You should be able to make sure your players understand the action system as well. With spellcasters, I would recommend printing off a sheet of their prepared spells to let them know what options they have immediately available to them. For all players, make sure they know what their class abilities are; if their options are described on their character sheets and can be quickly refereed to, they're more likely to learn them. Readily available descriptions for Feats, Spells and Class Abilities will reduce confusion at the table

All of these are pointing to one thing: Reduce Complexity. Your players will understand Pathfinder better when they aren't immediately thrown into the deep end of interlocking mechanics, build choices, and combat options. If you present options as they come up (or let players read and discover for themselves between sessions), your players will be less overwhelmed and have more fun.