WooCommerce Site Speed Optimization

My entire WooCommerce website requires speed optimization. I'm experiencing slow loading times and lag during navigation across the site. However, I haven't conducted any speed tests or analyses on the website yet.

Ideal Skills and Experience:
- Extensive experience with WooCommerce
- Proficiency in website speed optimization
- Strong analytical skills to diagnose issues

Please note: I haven't run any speed tests yet, so your initial assessment will be crucial.