there are some important steps you may follow :
1. Improve your Onpage SEO including meta title, description, Headings tags and optimize your Images.
2. Improve your Offpage strong SEO including backlinks.
3. Improve your Technical SEO.
the important thing is if you do this all yourself then it's amazing. But I give you an opportunity that I have experience of SEO services from a very good software house I give you a link you will contact. https://www.codeagepk.com/seo-services/