What kind of advice? 

Having a cat is a lifetime commitment. It's a companion. Not a toy / something to be a bragging right. It's like a close extension of one family member. So, on daily basis, it's like one of your family members that you have to attend to. 

Not really a lecture, just sharing some experience. One of my cats even died on my lap. Sick.     

Okay, I used to have a Maine Coon. Bought it when he was 4 months old. Was with us for nearly 2 years. He was stolen.       

Having a big cat like Maine Coon is like having a cat. Not much different than any other cat. Cat will do cat thing. Respond to you at their own term.    Talkative, eats a lot (we fed him Royal Canine Maine Coon dry food and boiled fresh chicken), loved to have a daily car ride.

Extra grooming is a must (extra long hair). Litter box must be clean twice a day. He's clean freak. He'll complaint all day long till it's clean. Meow meow meow.. my litter box... hooman - clean it...

Nothing much. Maine Coon just a big & heavy cat. Gentle giant IMHO. Not hectic & notty like Bengal (used to have one too).

Owh, forgot, Maine Coon can be train to be leash like a doggo.  We used to bring our Maine Coon out on leash.

It's rare for a cat to go near water. They normally like their fur dry and warm.