I've done my own bar tape for decades, and the only suggestion I could give is to try to tension it evenly. You need to pull as you wrap, and finding that proper tension takes trial and error. You know you have it when it feels good all around and the edges don't 'roll up'.

I change mine when it starts getting worn looking, and I always have a few extra rolls in my parts box.

The color that looks good on my road bike is white, which is a pita to keep looking good. But it matches the white saddle, and the bike is half white too so any other color just won't look right. Currently I am using Specialized tape, and frankly I don't like the feel of it, too spongy. But it is cleaning up well so it looks like I am stuck with it for a while. I use dish washing soap and warm water on a terry towel to clean the tape and it works well. I will probably go back to Deda tape when it gets yucky.