FBM vs FBA For New Seller

Just getting started on Amazon selling retail and online arbitrage using FBM. I’m just starting and learning. I have sold around 30 items so far through FBM. I quickly noticed it’s tough making a profit because of shipping fees. So my question is this. Should I continue FBM route? I have considered shipping a big bundle of items to Amazon and use FBA but unsure which way is most profitable? Keep in mind I’m a small seller just learning the system. Thanks for any help/advice!