Hire someone (an SEO Consultant) that DO have an idea of what you need to focus on.
Without looking at your site, I would focus on these and, hopefully, it will point you in the right direction...
- Technical SEO
- It doesn´t matter how well optimized your site is for any of the points mentioned below, if search engine bots are having a hard time crawling, rendering, and indexing your site none of that will matter. So, make sure your site is in compliance with SEO best practices from a technical perspective.
- robots.txt
- sitemap
- speed/performance
- canonicals
- broken links
- HTTPS
- etc
- On-Page SEO
- Setup Google Analytics and Google Search Console
- Keywords usage
- Body content
- Title tags and H1 headings
- URL
- Meta description
- Internal links
- anchor text (contextual are best)
- etc
- Keyword Research
- Make sure your pages are targeting the right keywords
- Content Optimization
- Is your content unique? relevant? engaging?
- Backlink Profile Analysis
- # of backlinks
- # referring domains (unique)
- # linking domains vs total links
- anchor text usage
- top linked pages
- organic traffic
- etc
- Competitors Analysis
- Do you know who your competitors are?
- Identify competitors' keywords
- Examine your competitor's content
- Reverse engineer their on-page SEO tactics
- Gain traffic insights
- Check competitor backlink profiles - Who´s linking to them
- Off-Page SEO
- Linkbuilding
- Guest posting
- Q&A platforms
- Forums
- Broken link building
- PPC
- Social Media Marketing
- Build an online community
- Email Marketing
I hope this helps, cheers!