Google Tag Manager Troubleshooting & Wordpress website speed updates

I'm looking for an experienced professional to help with updates to our Wordpress website. Specifically, I need assistance with improving the functionality of the website and its speed. I already have a Google Tag Manager account set up, and I'm hoping the professional can help us setting up conversion tracking within it. We are experiencing issues on this end and need someone with knowledge of Google Tag Manager to troubleshoot this.

Prior experience with Wordpress, Hubspot and Google Tag Manager is essential for this. If successful, we may consider ongoing cooperation.