Sleep Training Advice

First of all, please don't try to convince me not to sleep train. I always told myself I never would, but my son's sleeping has regressed beyond help. The past month and a half has been AWFUL. 4-5 wakings each night, and sometimes he won't stay asleep when we lay him down. No one is getting enough sleep, including my son. It's come time to do what I don't really want to do but I know it will eventually be for the best.

We're going to do the Ferber method, which we will modify slightly if needed. He has a strict daytime schedule and his naps and bedtime are always at the same time. We have a well-established naptime routine and bedtime routine. He always goes down initially pretty easily.

Anyway, I've heard the first few nights are really hard. I can't stand to hear my baby cry. What is some advice you could give me to make it through? I'm going to buy some mtn. dew so I'm not too tired, and I'm going to bring my Switch up to my room to pass the time...there's a fish I need to catch on Animal Crossing that I can only catch at night. 😂 Anyway, all joking aside, do you have any advice for me? All is appreciated!