Can you pack what you have, put on the shoes you have, and go for a dayhike to test it out? You may not have to buy any shoes at all. Or you may decide that runners just aren't for you. Better to do that on a dayhike with an easy way out than on a trail for a weekend or longer.
_________________________
"Stand in the ways and see, and ask for the old paths, where the good way is, and walk in it; then you will find rest for your souls."