Oh yeah, first ones are a voyage of discovery!! I still have some very early ones kicking about, and they're good for a giggle.
There are guides about which may be worth reading, I did a real-time step by step on my Facebook site a week ago too, which may (or may not!) be worth having a look at.
Most importantly, take your time, build up slowly (easier to put more paint down than take it off!) and enjoy!!
Oh, and wear a good mask
