Joomla and VirtueMart Upgrade Assistance

I need help with my Joomla and VirtueMart setup. Tasks include:

Fixing structured data errors on subdomain:
- Schema markup errors
- Need for accurate product information, organization details, and breadcrumbs

Finalizing Joomla 4.4.13 upgrade on development sub-domain:
- Resolving non-functional extensions
- Fixing callback errors preventing front-end access
- Correcting backend component errors and config issues

Ideal skills and experience:
- Expertise in Joomla 3.10, Joomla 4, and VirtueMart 4
- Strong background in handling upgrades and version transitions
- Proven ability in template design and customization
- Portfolio showcasing relevant work is a plus

I aim to complete this within 2-3 weeks.