New rider here...I need advice.

[Grog]

You're good to go!

Oh, a water bottle. Or two. And a repair kit (and the skills to use it, so that you won't be despondent if you have a flat tire on your own).

The rest is gravy. Like bike shoes and automatic pedals (or just toe cages of some sort if you prefer). And bike jerseys with pockets (to carry food and other stuff).

Welcome to TE! We look forward to reading about your cycling adventures!

[Biciclista]

A really good thing to have is a portable pump. Most everyone here's favorite pump is the Topeak road morph.
it's lightweight and even I can use it to pump up my tires.

[ZenSojourner]

A really good thing to have is a portable pump. Most everyone here's favorite pump is the Topeak road morph.
it's lightweight and even I can use it to pump up my tires.

Definitely, I've had several other pumps, none of which ever lasted very long and at least one of which disintegrated in my hands the very first time I used it.

I've also had at least a couple that I wasn't strong enough to actually use. Magilla Gorilla could pump his tire up with one of those, but I didn't have a chance.

Some frame pumps lack a pressure gauge, or the one they have breaks or is inaccurate. Hence the separate pressure gauge I carry in my seat bag.

I've had the Topeak for a long time now, and I can actually pump my tires up, it doesn't mangle the stem, it's giving no sign of breaking, and the pressure gauge is still accurate. In fact a lot of times I'll just pump my tires up with the Morph pre-ride instead of going and finding the floor pump.