You won’t drown if you jump in these waters. You must be bold and not expect a hand to be held all of the way. I’ve proven a few silly questions will be answered but also spent many days not getting anything to work but acculating a lot of knowledge. This makes it much more enjoyable when you light a light bulb or open the garage door.
Buy this or similar https://www.amazon.com/gp/product/B01IK9GEQG/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 and then google for project ideas. Here is one to start with - https://community.openhab.org/t/oh2-control-esp8266-relay-using-mqtt-eventbus/18127
Remember you can always start over.