Hello fasterice9!
All advices given above are good.
I only want to add that lot's of stuff depends on the market you target and other geo specifics.
I seems to me during the first year you need to work on these aspects of site: content (create a qood and high-quality one, make sure you do an on-page optimization. Also it's very important to pay attention to do
SEO friendly meta data, URLs, interlinking, external links insertions, optimized images and etc.). The quality content attracts backlinks.
Work with design and UX, improve page speed, optimize a website for mobile device and only after (~more than six month) you could try to build baclinks. Make a competitors research to get ideas how a really good website must looks like and keep creating it.
I know, it's ling and difficult way but it definitely worth it.
Good luck!