I know you hate this part of SEO, but manual outreach is one of the best ways to build links even though it is tedious.

One way to make it easier is through Ninja
Outreach. This extension shows you all of the email addresses associated
with a given domain.

Once you find a relevant site that you want to approach for
a backlink opportunity, you can get their contact information through a click
of a button and start crafting your custom email.

Extension #12: Keywords Everywhere

This is probably the most popular extension out there for
SEOs.

Keywords Everywhere is great for anyone who is doing keyword research.