Definitely, but be sure to keep up the same quality too.
No, the pricing doesn’t determine your gig quality or scope of work. I suggest raising all your prices to at least to 10$. You may wonder why? To separate you from others. In return, triple your basic package offer what you would normally do for a fiverr
Regarding English knowledge, simply write a note that English is not your first language, but reassure your buyers that they will receive original and unique content in return. If the price is good and the quality of content is superb than they can easily hire a proofreader to rectify your mistakes.
To be honest, I am not sure. I think that if you receive a bad review on your gig that it sticks to your profile, but again, I can’t vouch for this since I never tried to delete gig cos I never received a bad review until a week ago, first one in seven years. To top it all, it was a misunderstanding from the buyer so I refunded him back. In short, he apologized, agreed to remove a review, but Fiverr support will not remove the review despite client approval. Now, I am stuck with a review, for a project on which I didn’t get the chance to work, for a project that I refunded back client and for a project to which I cannot respond to client’s feedback since they revoked my access to leave my own review of client’s feedback thus breaching their own TOS.
What I want to say is that Fiverr system is not perfect, yet, so don’t waste your time and energy on something which hasn’t happened yet. In return, focus on your development and your freelance career.
Btw, you wrote that this is your only income. Have you considered applying to other sites? Fiverr is my third income and due to the earlier incident I had with them I am thinking about devoting my time to other areas and skipping Fiverr since I don’t like how Fiverr support deals with certain cases. However, this is not the place nor topic to discuss it.
Anyway, I learned quite a lot during the last seven years so I would be happy to share it