I am relatively new to the game and have played about 15 to 20 games and one problem I have seen always is the lack of leveling I do. I have tried other characters and I think I just need a little technique. Do I have to jungle more or what?

right the craic is everything you do in dota has to have purpose you must move from lane to lane with a goal ie kill creeps / kill hero /stack camps / get rune shit like that pritty much 70% of dota is time management and just getting the flow of the game just keep playing and anytime you notice yourself doing nothing fix it...when I started I had the same problem

So basically I need to keep moving around?

You need to keep moving around with purpose. Its tough to get a hold on. Roaming with no target in mind is rarely a good idea. Carries stay in lane farming unless they can get kills, supports should be roaming looking for kills. You get better at it by playing more. Its weird to get a hold on

Heres what i used to think, and its something i still think.

if im questioning what should i be doing? usually i should go find something to do, whether it be stacking camps and ancients with your carry. Smoke ganking: my favorite. or even farming an open lane as long as your carry has a place to farm. Contrary to popular belief, supports need farm too. You dont want them to just become the easiest food of the enemy teams life so if you can get a little something to remove that edge for the enemy team from a few minutes of farm then by all means do it! carries might be your damage dealers. but good supports more over, supports with a little bit of farm will win you games more than you could ever imagine. that big mek pick up or a pipe or force staff, even drums or a few bracers makes all the difference! the nice thing with all those items too is theyre made up of lots of items that cost very little gold so as a support when you are starved for gold you can be buying these items bit by bit. Another thing too is that youll naturally want to give all the farm to the carry, and thats great its the best case scenario to do that. Smoke ganking with the other 3 members of your team is a great way to get gold and to make sure that you keep the enemies carry from being as fed as yours if you repeatedly kill him hes going to be underfarmed