Dealing with Capital Gains Tax / RE Accountant?

[David A.]

I purchased a home in November 2017 and am putting it on the market March 1st - assuming that it sells fairly quickly, I'll have owned the house for under 2 years and will have to pay capital gains taxes (for reference, CT house purchased at 91k, ~25k in repairs, listing at 170k - I'll be probably renting a place to live in myself as soon as a deal goes through, then looking to purchase a multifamily to rent out within 6 months or so, but very unlikely immediately after closing).

I have a sort of two-part follow-up question about this, which is rooted in the fact that I know very little about capital gains and am feeling overwhelmed every time I try to Google/BP search the topic. To start, does anyone have a solid, comprehensive, and easy-to-understand source for me to get started on?  

On the other hand, is this something that most folks end up having a conversation with their RE accountant/lawyer about? I have neither and am nervous about paying $100+/hour to get advice that I could theoretically learn myself, but I'm guessing I should probably start building these types of relationships as I dig my feet deeper in REI...?

I appreciate any advice y'all can offer!