Boost My Domain Authority (DA) -- 2

I currently have a Domain Authority of 37 and I'm aiming to increase this

I've tried some backlink building strategies in the past, but they were only somewhat successful. I'm looking for an expert who can help improve my site authority. I need tips and analysis to see where I should focus my efforts. I have a limited budget. I will pay for guest posts through Icopify if needed. If the fee you offer can include article posting, great, if not, I can pay $10 for articles through icopify..