I wasn't actually sure what to title this thread, so I just put the name of the game.

What I am looking for here is some tips, tricks, etc ... pretty much anything that can help someone who just started to play the game as much as possible is very appreciated. I say this because I am the one who just started playing. This game has been very popular, I know, but I have finally been convinced to start playing it. I believe I'm at rank 12 or 13 currently, so I can't play Competitive yet. But I'm still not sure if I have a complete hold on the game just yet.

Maybe you can explain who is your favorite character and give a brief explanation about why he or she ( or it ) is. You can also talk about when is the best time to use said character, and possibly give some good combos to use and when.

I have already watched a bunch of videos explaining some of these characters and their abilities and whatnot. But I just figured I'd mention it on here as well and see what you guys think of it. Even though I am still just a noob at this game, I have already had some big help from thing1 and his friends so far. Thanks for the help man, and I look forward to playing it more!

But any additional help I can use is well received

I think for, commit to Lucio. By the time you hit level 25, you'll have a decent hold on him. You'll also be a healer, so your teammates will love you, and will actual defend you, which is a big thing (healers don't always get love if they don't do a halfway decent job). 
From there, just practice with new people when we / you do arcade. That's how I did it. I started with D. Va, and just tried new people when doing the arcade matches.