Well, typically you and your spouse could each contribute $5,500 to separate 2017 IRAs. So, $11,000 together. If you like Fidelity, use Fidelity and get a low-cost, broad based stock index mutual fund or ETF (I like VTI, but there are plenty of good options. I don't use Fidelity.)
And do it again in 2018.
That would take care of all of your self employment income, so that's what I would do.
If you're in the 12% bracket, a Roth probably makes more sense than Traditional (deductible) IRA.