Since portability is high on your list of priorities right now, I'd suggest a jobsite saw. No, it won't be your forever saw if you get serious about woodworking, but it's a good starting place from where you are. It's a pretty competitive market with decent offerings from Bosch and Dewalt that I know of in the big box stores. Makita probably makes a good jobsite saw too. Stay away from Craftsman, Black & Decker and Ryobi. As others have said, buy the best (most expensive) you can afford within types. Good Luck and Welcome.
“We should be careful to get out of an experience only the wisdom that is in it and stop there lest we be like the cat that sits down on a hot stove lid. She will never sit down on a hot stove lid again and that is well but also she will never sit down on a cold one anymore.” - Mark Twain