Optimise my website SEO

We would like to get our website to get in the top 10 on the first page. We would like to rank for the following key phrases:
- shift scheduling app
- shift scheduling software
- staff scheduling
- shift planning
- employee scheduling software
- staff scheduling software
- staff rota
- staff scheduling app
- shift planner app
- shift schedule app
- shift management software
- shift rota planner
- shift planning software
- shift work app
- staff scheduling online
- staff rota app

Website URL www.rotawrangler.com. Aslo website is build on Squarespace