I work at a SaaS company in the energy industry, 4 of our engineers including myself (3 electrical, 1 chemical) have gone though the certification for solution

I work at a SaaS company in the energy industry, 4 of our engineers including myself (3 electrical, 1 chemical) have gone though the certification for solutions architect associate. We did this as we all transitioned to working on our SaaS product from our previous engineering disciplines. It's fairly useful but served more to verify that our web infrastructure is correctly implemented rather than teaching us new paradigms. I think you'll probably come close to certification level through usage of the docs and implementing real-world solutions - as we have. I think the professional level courses will probably be more challenging and useful. Also worth mentioning that these courses tend to propose AWS products as solutions to common problems in infrastructure design, keeping a critical eye for these problems allows you to learn what's actually happening and why you "need" to use the correct AWS product. If you do this you won't feel as locked in to AWS as a provider and will be able to transition to GCE or similar if needed.