Hi
I was diagnosed T2 at the end of May and was given no advice by the gp beyond 'make a few small lifestyle changes', discovered this forum and read nearly everything on it and am now in the non-diabetic range.
I followed the low carb and fasting route and weight training 5 times a week. No I'll effects and muscle mass and strength increasing at a decent rate ... on par with training some 20 years previously. I've also lost 4 stone so no complaints!
My advice would definitely be keep up the weights and adopt a low carb diet - they work hand in hand for me.