From what you have said strength training and cardios good. Its a good foundation for holding yourself up in a fight, but your also going to need technique. One of the few ways to achieve this is by practicing technique and putting it into practice.
Have you had a look for any local clubs? If not. A sparring partner a friend perhaps, that way their is no hard feelings afterwards, this then provides a way to put technique into practice and find out what works with feedback from your partner. Also providing a valuable element, conditioning.
Good luck let me know what you decide and if theirs anything else.