Would Microneedling work good for deep horizontal forehead wrinkles & glabella wrinkles (11's)?

I recommend that you consult with a board certified dermatologist to discuss a suitable treatment plan for your needs. There are many options for treating wrinkles including Botox, HA fillers, microneedling, lasers, chemical peels, and combination therapy. An in-person evaluation is the best way for a treatment plan to be developed that best suits your needs. It will also be a great opportunity to discuss your medical history with your doctor so that this can be taken into consideration when developing a plan.

I think it is the safest for you at this point.  It will not have the dramatic almost immediate gratification of botox and fillers.  It's worth the try.