I began meditating every day after I wake up four years ago and it has been the most beneficial change I ever introduced into my life, quitting cannabis securing a stable second place. I began with five min and worked my way up to 15. Now I have an iOS shortcut “hey Siri, start meditation” which sets a timer randomly between 15 and 20 min to counteract the body clock expectation of a fixed duration.
Have you tried meditating at other times of the day? I would be afraid that I would fall back asleep if I tried meditate after waking up. :)
I sit on a chair and try to keep good posture so falling asleep has never been anything I’ve worries about.