My first recommendation is to ditch that holster. Several NDs have been attributed to the trigger finger push button release they use. Some IDPA clubs, including mine, have banned them.

The next question is what's your goal with IDPA? Serious competitor, fun shooter or CCW practice?
If you're serious, there are ways to "game" it and still stay within the rules. You'll learn as you go.
I shoot IDPA because its as close as you can get to real world practice for concealed carry. But then, at 63, I just ain't fast enough any more to be a serious competitor.
I use just normal everyday guns and carry gear just like EDC.
I also do it just for fun.