Well, none really. It depends how new you are.
I mean, some excellent manual girth exercises include the various squeezes you can do. However, it’s quite easy to go overboard with these and cause some damage.
My advice would be to carry on jelqing (and whatever else you do, stretching etc.) until your unit is more conditioned, then mix in kegels with your jelqs to up the intensity, and then up to squeezes (do a search for the various squeezes you can do).
Lastly, a desperate attitude i.e. “my girth sucks. Help!” is a dangerous one to have in conjunction with being new to PE; over-zealousness could cause you to injure yourself.
So I recommend you take your time; you have excellent length, I would be happy to stop at 7.5” NBPEL (especially with my fat pad my BPEL would be great! Lol) and most people it seems find girth easier than length, so welcome to easy street! Stroll, don’t run and you’ve got less chance of falling. <—- What a crap analogy
You get the idea.
And welcome to the forum!