I'd personally recommend someone else to spell check your writing if it is too difficult for you. Having proper grammar in your public game project (and especially at the very beginning) will entice more people into your content, or at the very least, nobody will be turned away from it by virtue of it appearing poorly written.
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I want to add to this comment
Please consider using this wonderful tool. I dont suggest it because i hate this project, quite the opposite. I just want it to get better. Heck, i`d even do all the work with the text for free, if you do not have time or motivation, (PM me, in that case) but only with the one that is already written. New content will be up to you.
Free version doesnt allow spell check, but there are other tools for it.
Best of luck with the project <3