Yeah, nothing will change - you'll be at your current position.
The only thing you'll likely want to get first (available at any orbital Station) are the different suits and personal Weapons.
The Exploration Suit has
far more Oxygen supply than the Flight Suit - and it carries (exclusively) the Sampling Tool to sample Biologicals while on foot.
All that Equipment can only be purchased when disembarking on foot while docked at a Station, it's also required to create "personal Suit loadouts" which you can choose from and put on only while on a Ship (your own Ship or an Apex Taxi ride).
So if anything, make sure you're near a Station before Odyssey goes live in order to get these things purchased and sorted once it is live.
As a really quick-guide :
- park Ship near or at a Station before Odyssey release
- log into Odyssey once it is live
- disembark at the Station and on-foot visit the Store inside
- purchase Suits, Personal Weapons and Consumables (i.e. buy MedKits and especially plenty of Energy Cells - they replenish Suit Energy which also governs your O2 supply, so see them like extra Oxygen tanks)
- access one of the Terminals inside the Station and create desired loadouts
- board Ship again and you're ready to go, redressing into another loadout possible inside the Ship at anytime (done from the lower/crouch Panel)
- change to Ship Equipment : The Advanced Docking Computer can now Auto-Land on Planet Surfaces, very useful... if you have a free slot, it's worth considering to equip
- enjoy