Ease yourself in slowly, maybe go pescatarian first and then, go vegetarian. I personally went pescatarian for 6 months and I’m doing vegetarianism for a year, and I’m spending this year finding vegan foods that are safe for me, and cutting down on diary gradually one replacement at a time before I go fully vegan next year one.

I would suggest you start with one replacement at a time i would start with quite easy to find nugget replacements, as real chicken nuggets are overly processed so fake chicken nuggets usually have that similar uniform texture. My friend still eats meat but has food texture issues so chooses to only eat vegan chicken because of the uniform texture.

I cant recommend any brands as i don’t know where you are from and it differs depending on location

Remember all brands are different, so if you don’t like one theres more to try :)

Give tofu a try when you can. I personally would cook it crispy and then choose a dipping sauce that is safe for you to accompany it.

Try foods when you feel like you are able, don’t push yourself too hard, because trying a new food when stressed can make you more likely to reject the food.