I started with a AR20, its ambidextrous, so can be used left or right, its light weight (weight can be added), shoots well, has some good adjustibility like you get on modern rifles, but in some areas its not 100% adjustable, but then it does not cost £2,000 +
Overall a good PCP rifle to start and learn with and there is scope to add parts and adjust as you learn how to improve your shooting.