I haven't read all the posts so my apologies if what I"m about to say has already been said.

Stay away from straps (aka rat trap pedals) at all costs. I got my foot stuck in one many years ago and ended up shredding my meniscus.

Practice Practice Practice with the clipless. I sat on my bike, in my basement, with one arm on the wall for support and just practiced clipping and unclipping. It does eventually become second nature.

Make sure you buy pedals that have an adjustment. As you become more comfortable with them, and you will, you can tighten them if you need / want to. And if you do get 'stuck' or forget you're clipped in, if they're set at a loose enough tension, you should pop out of them anyhow (much like a downhill ski binding) thus saving your knees & meniscus.

Keep in mind that forgetting you're clipped in and falling is a rite of passage. It happens to everyone. Usually when you're at a stop sign and tons of people in cars can see you.

good luck.