+1 vote for lessons as the starting point.
That should get your score into the 50's --short game in particular can pay huge dividends in scoring by getting rid of 3 putts and reducing errors while chipping.
After that, I'd upgrade the oldest item in your bag with something a couple years old and/or used. Example, you have a 10 year old driver, find something 3ish years old. Golf gets even more fun when you start to break 50 regularly.