Repairing small holes in fabric

[Jim]

I am new to this and would appreciate any advice about whether or not for a novice to try and repair small holes in my J-3. I am told the fabric is called razorback. There are spots that have been repaired before that look like tire patches have been applied and painted that look real nice.
Is this something I can find directions to do or leave it to a pro?
Jim

 

[rrb]

 

[Denton]