Welcome to the Forum!!!
The biggest piece of advice that I can give is to try to find a boat that has been lovingly maintained. At that price range and size, I would suspect you are limited to a fairly old boat. Older boats can cost a lot in terms of upkeep, maintenance, updating, and repairs. If you start out with a boat suffering from lack of maintenance, those costs can become prohibitive even if you somewhat of a DIYer.
Even if you can find a well maintained boat to fit your needs, do not invest all available funds in purchasing the boat. Keep a sizeable budget available for "upkeep". For this age and price range, I would suggest that the often quoted 10% of purchase price per year might not be enough, especially in the first few years of ownership.