Congratulations on taking the plunge and buying
your first boat. I'm a bit envious, because you are going to learn so much, and have so much success and satisfaction coming your way soon.
You have already received advice above on a ton of topics. So my advice will be limited. Do one thing at a time, and do it well. The best source of info is other local boaters.
I had a C&C25, very similar to your catalina 25, and I would not have hesitated to spend the entire summer aboard. In fact, the worst part of any sail was having to go home after...I just wanted to be aboard all the time. I'm not far from you, just up on Lake Ontario
. Your boat is fine for Lake Erie. A small boat keeps the costs down.
So your fist step is to get your boat in the water. Its not much fun to own a boat on land. You didn't mention if its on a trailer, but your mention of truck and hitch imply that it is. I have found its easier/cheaper to hire a guy with a truck rather than rent a truck yourself. Any marine
hauler would have a suitable truck, and might be willing to help you with this "small" job at a reasonable price
. I hope you have found a suitable marina or at least a good ramp
for launching. Once you are among other boats and sailors, you will have access to more help than you can imagine. As demonstrated by this entire forum, sailors love to give advice...LOL!
Good luck with your boat, and don't forget to have fun!