I would discount laser surgery; I'm certain it's now an option for serving pilots, at our own expense and risk, in lieu of contacts or glasses (as long as you go for PRK and not LASIK/LASEK). It's not an option for new joiners; if you've had laser surgery of any type at the first medical, I don't think you'll get in.
Asthma and lack of qualifications are yet other hurdles. Instead of bothering with waiting for replies here, though, start getting in touch with the careers service. The nearest AFCO will give you the definitive answers, it matters not a jot if you get 50 people here saying "go for it lad!" if they've got no idea about the current medical and academic requirements, as positive encouragement isn't enough to get you to a first interview!
Contact the experts. Prepare for disappointment. There are still hundreds of applicants for every space; wanting it isn't enough. Good luck regardless.