Welcome! You found the right place for your journey. We have lots of people at various levels of LC and eating styles from carnivore to vegetarian.

It sounds like the first step is focusing on real foods - i.e. vegetables instead of the stuff that comes in a box, bag or can from the center aisles in the store - when eating carbs. This will naturally lower your carbs and likely remove 99% of the potential food allergies. The only somewhat common exception I can think of is nightshades (tomatoes, eggplant, peppers, etc.).

We have a couple of people I can think of right off hand who are low meat or pescatarian who may be able to help you with diet options like @tcunbeliever & @LynFaith for starters.

Good luck!

Consider that you may need more protein and fat during the initial adaption. You can start with the meat, shake, and nuts but you may find that doesn't satisfy hunger or cravings at first. I've found its hard to overeat too much on protein and fat but the best thing to do is just start with where you are and adjust as you go. You may also consider not going too low carb at first, but lowering the carbs as you go.

I only eat animals that swim. No other animal products. I am wrapping up week 3 of keto. I have to eat fish twice a day. I switched from cashews to pecans, sunflower seeds and peanuts as my nut sources. I like the Vega protein and greens. I add cocoa powder to it along with almond butter. I restrict myself to 1270 calories a day. It IS possible to do keto without meat.