If legalism is defined as following God's word as set forth in scripture rather than manmade traditions, then guilty.
Enjoy your Passover then. Legalism is defined in following God’s Law. Good luck with keeping that in its entirety.
‘God’s word as set forth in scripture’
See also the above for the odds on a man or woman keeping God’s Law. You have already failed. See the above for finding salvation in the Law, it isn’t there. Luckily, you can also find the path to salvation in the above as well.
‘following God’s word as set forth in scripture’
Another failure for you already.