>socially-awkward shut-in
Change two things about yourself

Find an E-girl.

why do you need a gf in this stage of life and are you ready for one mentally and emotionally?

Go outside and get a job.

>>34396942
A Legend (read it - it has a moral):

How Shaking Hands Began
In days of old, knights in armour who wanted to show friendship would take off one metal glove and extend their bare hand, knowing the other guy could cut it off with his sword, but hoping the offer of vulnerability would create trust. Two knights wanting to show friendship would both take off a glove and shake bare hands.

The moral: EVERY human interaction, from shopping to making love, involves some risk of being hurt. But sometimes you juat have to take off the glove.

>>34396942
If you're actually socially awkward and you're not say, suffering from other detractions the rest of us are (like ugliness or mental illness), find a regularly used voice chat software tool (such as Discord, Element... shit, even in-game), and start initiating conversations with strangers.
If you don't know how to do that, learn ice-breakers. Learn how other people start a conversation, and copy what they do.
Eventually you will get used to starting up conversations. Then move onto practicing light humour (puns, dad jokes, mild sarcasm, irony, etc) so you can start making people laugh.
Yes you will fail. Yes, there will be times it will feel or sound awkward. But you'll learn other people feel awkward in social interactions too, and that is perfectly normal.
Once you get jokes down, start finding common ground interests between you and strangers. There's two ways to have a common interest, you can either pick communities where that is already a thing (E.G. you love a specific video game, but that's very nerd incel type behaviour) OR you adopt someone else's common interest that you find out that you like (E.G. you see how much you like football, golf, tennis, etc).
Then it becomes a case of
1) Talking about common interests, and
2) Making jokes
Congrats, you're halfway there. Unfortunately OP I cannot take you the rest of the way but you will find yourself socialising and even having fun in next to no time. Always avoid depressing and negative concepts and subjects, that's always a social vibe killer.

Oh and for the record OP, there is *always* an obnoxious douchebag you makes you feel bad. Practice socially shunning them by ignoring/not engaging in conversation with them. Nobody likes them.
Avoid learning toxic, abusive, insulting behaviours, and don't do anything you wouldn't do in-front of a 7ft tall angry muscular man who is ready to perform a beatdown on you (that way, when you move into physical conversations, the transition is almost seemless).
As for scoring the GFs, you'll need to start icebreakers, jokes and common interests with them either in person or online. You will either keep hitting landmines (they already have boyfriends) or you'll find out that secretly you're just ugly.

>>34396942
Post an online ad saying you want a girl who likes spending time indoors, frogposting and having sex. Simple.