any tips for a noob like me?

Everybody is new at some point.

My tips would be:

1. Enjoy yourself. That's what you're here for but Apex can be pretty brutal so prepare yourself for that and don't forget to have fun.
2. Start making some friends as soon as you can, as playing in a squad is what Apex is all about.
3. Save up your Apex Coins and crafting materials until you have a good understanding of what you can buy with them and how they work.
4. Use the training mode to get used to the game before trying the multiplayer and eventually ranked. Also try out the events as they are great fun.
5. Pace yourself when doing challenges and try to break them down into individual goals to make them easier.
6. Everybody is always learning so feel free to use the forums to ask any questions. We're all happy to answer.

Some 'tips' threads from a few months ago but they might still be useful:

https://answers.ea.com/t5/General-Discussion/Tips-Tricks-and-cool-stuff/m-p/7436639/highlight/true#M567

https://answers.ea.com/t5/General-Discussion/How-to-survive-in-Apex/m-p/7771360/highlight/true#M19351

https://answers.ea.com/t5/General-Discussion/Tips-to-Improving-Your-Aim/m-p/7700476/highlight/true#M14574

https://answers.ea.com/t5/General-Discussion/Movement-Guide/m-p/7779795/highlight/true#M19897

Good luck!