I feel like im getting old and need to be more mature,
Should I start looking for a wife now?

I dont wanna be 30 and
Ask yourself a few questions:
What's your 5 year plan looking like?
Where do you want to be at 30? Still chasing dreams? Still holding onto youth? Or settling down?
What's your 10 year goal list?
Where do you want to be at 35? Married? Married with children? Jet setting? What kind of career path are you looking at?
If you can answer these questions then you'll have a good idea about what you should be doing right now to set up the outcomes that you're looking for.