Self-confidently publish them and get corrected later >8D
I'm usually confident with my English, but there are some times where I'm sleep-deprived and get some typos here and there. There's no shame in getting corrected. Most people have two languages, like you and me, some even more. I have around 4 and I don't expect to be perfect in each and one of them.
If you like reading, I suggest you do that. From books to fanfictions, playing games, reading so much English that you can confidently write it down.
That's how it was for me, anyway.
But if not; get a dictionary, or a friend/teacher/parent that can. There are also people who want to beta, actually I found quite a few of them in fanfiction-sites. xD