Learn English – a noun for “one who is adroit”

In some professional organizations, the word "Journeyman" is used for someone who has passed their apprenticeship and able to complete work on their own, but are not necessarily masters yet.

EDIT: If you are seeking a skill level reference for learning material. This seems to be a standard:

For Beginner [programmers, developers, carpenters, chefs]
For Intermediate [programmers, developers, carpenters, chefs]
For Advanced [programmers, developers, carpenters, chefs]

You are asking for a word to replace "intermediate", but the more I think about it "intermediate" may actually be the word you need.

My suggestion sounds a little naive, but doer might be a word to consider.

For example, "I see myself as more of a doer than a thinker"

From MW

a person who actively does things instead of just thinking or talking about them

It doesn't necessarily mean that a doer only accomplishes things physically though, but I tend to think of a doer as someone who 'gets stuck in' and physically gets things done rather than just planning or thinking about it.