Hi,
As it’s a service-based website, you must focus on more intent keywords for better results.
Here are couple of things, you must try:
1. Look at top ranking website for your planned keywords. Analyze their backlinking profile and domain authority. It should give you some insights on how much backlinking efforts to put in, what kind of backlinks can be aimed etc.
2. Analyze the difference in content on competitors website vs your website. And accordingly update the content.
3. Google gives weightage to content freshness, updating the content will also help.