Some additional points on what people have said...
You need to load first, i.e. taking 3-5 g per day may help, but you won't see the full benefit. Some sources say to take about 20 g for 3-7 days, then drop down to the 3-5 from then on.
Secondly, if you stop taking it, it will take about a month to unload... so if you forget for a couple of days, add say a gram to your next dose for every day you missed. So if you miss four days and you usually take 5 g daily... take 9 g for the day you go back on it and then drop to 5 g from them on.
It doesn't matter how you spread it out. You can take 5 g in the morning, or five lots of 1 g through the day.
Some people assume that because it's an energy source (per se), it could take towards calories. It doesn't. You can take it on gym, rest and diet days.
Creatine is MASSIVELY OVERPRICED. Five years ago, before covid, you could buy a kilogram for £8. Now the main sites like Myprotein and Bulk, (even with their pseudo-discounts) you're looking at now at least £35-45 per kg.
Do a bit of shopping around (ebay etc) and you can generally get it for £20-25.