DIY for Life baby. Just make sure you backup all files before hand, just Incase. Also read and read-read that iFixIt link above, and watch some YouTube videos just to ensure you’re comfortable with it. In the link above check the top comment. Seems like someone has a method to cut the time down drastically. Also looks like you’ll need some specific tools.
Fucking Apple. I love their products, but hate their lack of repairability. I can understand certain parts being inaccessible but the battery should be designed in a way that’s easy to fix, since the computes otherwise can last a long time. But I guess that goes against profitability which is always number one.