I have a friend, I'm with him tomorrow and we're watching Netflix. Most of the time it's like I'm leaning on his shoulder as he holds his head on mine while we're playing (is that already cuddling?)
We have already kissed our lips, but that was mostly just a kiss
How do I get it that I give it more than just a kiss and how does it work?
First of all, yes, that's cuddling, if not very intense. Build more body contact, you both like that.
I suppose now that he has little experience with girls, if at all. So tell him next time in a pleasant moment that you would like to do a kiss. You can do it easy too, but he seems to be a shy guy and you certainly do not want to take him by surprise.
For a tongue kiss, you basically have to do nothing but stick your tongue in your mouth when kissing (or vice versa). Online you can see many instructions on how to move your tongue, but they are all obsolete. Just plug your tongue into his mouth, the rest will happen by itself.
How should I build more body contact?
Hoffentluch kisses you better than your grammar is
Instead of holding hands, hug him from the side, lay half on him, or sit on his lap.
Can practice
Take a bonbon between the incisors (two-thirds inwards) and play with the tip of the tongue. Loose, try to reach him everywhere without sticking out his tongue and without drooling. Until he is empty.
When you kiss, do not open your mouth much like the candy, just as far as the tongue tips have both space between your teeth and can play with each other. Support that with a light suck when your lips are on top of each other. Do not press too hard, do not drool, do not push the whole tongue into the person's mouth. The tongue tips must look for and play with each other without much more than a cm of tongue length being used.
Hope could help you - Have fun
Say, I want to kiss you… Kiss right.