@therosesword awesome words of encouragement here. Love it.
I'd like to add something I gleaned from when I was first looking into making webcomics. I read that it can take approximately THREE years for a webcomic to make any sort of waves. And that is with consistent releases. Don't give up after a week or two. Just don't. Stay committed, even when it's hard.
Obviously, not everything you attempt will stick. But at the very least, keep plugging away, and if you need to take a break, do it. (Even though that's something I never do XD)
But try to have mercy on yourself, don't put a ton of pressure on your mind. Use small goals to move forward. Even the tiniest step is progress. Five minutes on a panel every day will add up eventually.
My main advice is, don't give up. Slow down if you have to, tweak what you need. But don't give up entirely, don't let failure define you.