can I start doing small business and can you give me any suggestions?

Are you still working right now? If so, I'd suggest you continue your work this year. You are said to have some chances for promotion. If you are not promoted by the end of this year, you might try to consider doing your small business.

Advice: it's likely that some other people might slander at you. You should act kindly and generously and avoid having any disputes with them. Otherwise, your postion might accepted.