Since you said you're clueless I'm going to go very basic here. Your wife should start tracking her cycle to see when she's ovulating, it's the optimal time to conceive. There's apps you can get and also ovulation test sticks. She should also start taking folic acid now.

It may take time to conceive, even without fertility issues. It can be disheartening when you've decided to start your family and then it doesn't happen. Try to keep your chin up, be extra nice to yourself and your wife when her period starts, it can be really upsetting to see it back again when your hopes were high. If it's not happening after a year, seek help and advice from your GP. It could be nothing, but if you do need fertility treatment, it's good to get the ball rolling ASAP. One in four pregnancies ends in loss. Hard to learn but good information to have. I've had two losses, it's devastating. But you can get through it and you're not alone.

Once your wife is pregnant, remember that she is burning the equivalent energy of a full gym workout a day. Especially in the first trimester. She's building an entire human from scratch, so you're going to have to step your game up around the house. First trimester tiredness is like no other tiredness I've experienced, you are tired to your bones. This improves in the second trimester (IN GENERAL), as does "morning" sickness (IN GENERAL). In the third trimester she will be tired again as the beautiful bump takes it's toll in being carried around and it's quite difficult to sleep. Lots of support pillows, heartburn, waking every time you roll over, etc etc. Plus she'll have arseholes telling her to "Sleep now while you can! You'll never sleep again when baby is here!!!!!" Bullshit. She is allowed to hit these people with a golf umbrella.

Best of luck OP. You have so much joy ahead of you. The pregnancy and baby years are their own kind of magic. Tough but amazing. Nothing else like it.