Tax/financial advice for playing poker professionally

[SFBobMar]

I recently took a 6 month hiatus from work to play professionally and things have worked out well, good enough that I’m going to continue at least for another 6 months. By doing that, my only income for the year will be from playing poker. However, I have no idea how I should be approaching this from a tax preparation/planning standpoint. I assume I can write off some % of my traveling expenses, etc. Overall, I want to understand how to best approach this before tax season comes up and I'm left scrambling. Should I just walk into an accounting firm and ask for someone who specializes in poker/gambling law? Also, I live in the SF Bay Area so any recommendations specific to that area would be even better.

If this has been discussed before, if you could send me a link or point me in the right direction, it would be greatly appreciated. Thanks