Self Employed Side Business

I work in TV/Film and because of the strikes, I started a sewing business from my home.  I registered with the county (Delaware County in New York) as a sole proprietor/DBA as I don't have any employees.  Would it benefit me to get an EIN number?  What about a wholesale number?  Can I deduct the expenses from setting up my studio?  It's a dedicated space in an apartment above my garage.  Also, much of my payments come through Venmo.  Should I set up a separate business account through Venmo?  So far I've made about $1200 total.