I'm just learning like you, and I'll sail in pretty well anything
under
25 knts. I tried once in winds over that and was flogged big time

. Winds over 25 knots seem like cyclones to me, and at this stage are more scary than fun...lol

I finally cracked this arvo as it was the 11 th day straight without sailing and winds under 10 knots, so I took out my only big sail (a 6.6 I got off Moby) and still had a ball in the 4-8 knts on offer. So I'll sail in pretty well anything.
As I only have two sails also- a 5.2 and the 6.6, between the two I'll happily go in 8-25 odd knots, with ideal planing winds for me (as I am a light weight) being 15 plus with the 5.2 and 10 plus with the 6.6.
You're doing the right thing sailing the lighter winds, as there's no point going out in the strong stuff till you feel comfortable with your sails and their power. But the time will come and then you'll be amazed at the speed, power and fun.