Taigh na Teud publishers include some teaching dvds with Sarah Naylor -- I think Beginner, Intermediate and Advanced? Good for those learning 'by ear'
There are various other Folk Fiddle tutor books from different sources, most including a cd to listen to / play along with
Depending on where you are based it might be worth seeking out either a regular class or periodical day . weekend workshops / Come and Try Its, or even week long summer schools. In the traditional / folk world these usually offer groups at different levels from beginner to advanced.
I have heard there are some online tutorial sites - perhaps youtube?

I assume you play another instrument (mandolin?) if you are making such progress in 3 months? Most of us sound(ed) like dying cats for a fairly long time when we started off! (Some of us probably still do----)