Actually, with the version of paint that I use, for some reason I can't get the proper fonts. I use what the template says, but it turns out far too large. Just don't have the right one.
Thats not problem of paint version, well there is no problem with any of paint version. You can use letters and numbers from finished drawings, DP make so many that you have full alphabet. And as you can see, don't make your designs fast, check references, then check them again and again ... get as many as you can and then start drawn.
The easiest way of all would be to use Paint.net or even go back and fourth from that and MSPaint.