I would say the best thing to buy "First" is a reloading book or two. Definitely one from a projectile manufacture like Hornady or Sierra, and maybe a Lyman book.
Read them twice till terms like "Ogive" or "OAL" and the benefits of a "Single stage", or a "Turret" or "Progressive" Presses start to have meaning, rather than other peoples suggestions.
This will also greatly help your learning curve when you get advice from other members and their words make a lot of sense.
There are great members here to give you hands on advise and being able to relate to their advise rather than a crash course will be a big plus for your reloading experience.

BTW, I reload the same calibers as your needs on a Turret Press. If you are venturing on that direction, give me a shout, I can give you some tips.

Welcome to the forum. Go to tbe introduce yourself thread and tell us about yourself.
...
To start, tell us
1. What caliber would you use most?
2. What firearm would that be?
3. How many rounds would you like to shoot every month?
4. How much money can you drop just to get started?
5. How much free time do you have to reload per week?
6. Do you have a space with a bench to set up a loader?
7. Do you have a good buddy that already reloads?

There are many knowledgeable people here and I do have a standing invitation to newbie reloaders to drop by the house to chat.
Answering those few questions will help keep the replies on target.