I don't agree about buying cheap toys to try with, they usually ruin the anal experience. However I guess the Billy
is very beginner friendly and can be used with almost no or very little warmup. The quality is superb and you'll feel comfortable in no time.
However the thing is that it provides just prostate stimulation and there are quite a few more things about anal pleasures than just hitting the P-Spot. I'd suggest to get a dildo as well for experimenting with penetrative stimulation; I guess the Spur VixSkin
is a good one to start with.