a person who acts in drama, performs music etc, for pleasure only and not professionally

casual participant

a learner of a trade who has agreed to work for a number of years for a small amount of money in return for being taught

novice, learner of a trade

a person who is learning and has only a little experience

person unskilled in something

a person who enters (for a university place, competition, race etc)

person entering competition, starting new activity

rookie; apprentice

person unskilled in something

a person who is still learning and who has no experience; a person training to become a monk or nun

person just learning something