Anything is that anything that is not already your forte is going to take a lot more time than something that already is and is going to require a lot of practice and learning. Accept that your early attempts probably aren't going to be great but give it a go anyways. If you want to explore new things it makes no sense to expect them to be like things you already know, it would kind of defeats the purpose.
99.9% of the ideas you think up will be way outside your ability to see through. It's kind of an artistic curse, there are a million things you'd like to create but only enough time and skill enough to create so many of them. Still, think up those ideas. Physically plan them out like you have unlimited skills and resources at your disposal. Exercise those demons. Even if you can't create these amazing projects you are still practicing and developing your planning skills which will come in handy when you finally hit the jackpot and come up with an idea that you can see a clear path for that is within your abilities.
I find it easier to manage the length of time it takes to make something by having several things to bounce between so that I never get so bored of one that I get bored of them all. When I finally do get bored of them all I take a break and spend more time outside and also more time immersing myself in the things I want to create (in this case, art, games, etc.) rather than trying to push myself to continue creating. I don't know what other creator's take on it is, but I know the more I create without a real desire to create the more I begin to loathe and avoid it. I have to think of myself as a person with diverse needs not a machine whose only goal is to create (a mistake I made constantly in the past).
Loneliness is a tough beast to tackle, but I've pretty much shifted creativity from the forefront of my life to the quiet space I can retreat to when I am trying to recharge from all the chaos of socializing. It was a hard thing to do because I always feel like I should be making or doing something, but by spending more time with people outside my creating I start to long for quiet time to spend creating. So maybe shifting your priorities a bit could help?
Rituals help me a lot. First thing I do when I go to create is start up some coffee and grab a few things to munch on, get some good creative music going, and before I start I try to imagine some scene or gameplay segment that the music I am currently listening to would fit as a soundtrack to. It is a familiar routine that steers my brain in the right direction towards open and creative thinking. It's like how for some a familiar prayer, chant, anthem, or cheer can shift their mood (for example to a more patriotic feeling).
Working with a different medium each day might work for some, but why it doesn't work for most is that you never really get enough time to know the medium or grow at it. You leave it about as skilled with it as you came to it. On the other hand, I have a lot of fun coming up with tools on the spot. You can grab just about any twig you find outside and char the end of it with a lighter and you've got yourself a charcoal pencil. Food coloring makes a decent watercolor in a pinch. I've carved some pretty cool scenes into boards with a rock. You have a lot of options that will grow you as an artist in crazy ways if you open your mind up a bit more.
Despite anything I've said above, your experiences could be much different than mine were and maybe my suggestions don't work so good for you. At the very least, I do think taking some time to rethink your approach and behavior is a good way to go. It's pretty rough when we get stubbornly stuck on something because we see much less options available and things can feel very hopeless and that is a terrible position to be in.
I hope you find what works for you. Good luck!
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