Create a .github/CODEOWNERS file and take a look at the example here. For your instance you may want the following contents

*   @JitMaharaj @JimThorpePIN

In the GitHub repo, go to Settings -> Branches -> Branch protection rules -> Add rule. Set Branch name pattern to main. For the rules, I recommend the following.

☑ Require a pull request before merging
    ☑ Require approvals
        Set to 1
    ☑ Dismiss stale pull request approvals when new commits are pushed
    ☑ Require review from Code Owners
    ☑ Require approval of the most recent push
☑ Require status checks to pass before merging
    ☑ Require branches to be up to date before merging
☐ Require conversation resolution before merging
☐ Require signed commits
☐ Require linear history
☐ Require deployments to succeed before merging
☐ Lock branch
☑ Do not allow bypassing the above settings

☐ Allow force pushes
☐ Allow deletions