Looking for career shift advice

I am currently software architect with 14yrs exp with 12 yrs in the same org, but got to work on different products,stacks every 2-4 yrs. But not being doing much coding recently, and it's all simple Python anyway with a sprinkling of C++. I have started hands on learning of JS, Django, Kotlin to get a feel of new languages and frameworks. Don't want to put entire resume here, but those are the key ones.

I enjoy my architecture and specifications role, but I think I might be missing lots of opportunities to learn different tech/stacks. Most importantly I feel up for a change after years of avoid risks to person commitments which are much changed now.

Coming to the point, what worries me most is that most JD in different tech/roles expect some prior experience/expertise which I don't have. Requesting comments/guidance on how to make this transition to new role/tech/org. If anyone has done similar experience, request to share approach.

I am apprehensive even of talking to my contacts for a referral as I'd like to try out and get some confidence first. I did a lot of transitions so far, but I wasn't deciding those. It was either customer/boss or chance. I am confident of learning anything, but not about impressing interviewers. Maybe a few interviews with Amazon and similar LEET based ones might be the cause of my low self confidence. I abhor those kind of questions unrelated to work and as a principle never ask them as an interviewer.