You're hunting for Focus Crystals, if I remember correctly from the guide above, you need 25?
Well you could be hunting a while for that amount. So collect everything you can.
If you make your way to system '16 Librae' which is 21ly from Mabe, there is a station there that has a Material Trader, he/she can be found in the station Borisenko Station. When you dock, go to starport services/contacts, the Material Trader will be in there. Here you can swap items you have for items you want. So it could be an idea to travel over to that system, do the nav beacon thing, collect what you can then visit the trader to get the focus crystals.
Once you have all the ingredients, make your way over to LP 685-43, dock at Lie Ring. Do the same thing, Starport Services/Contacts but this time look for the Technology Broker. Here you hand in your ingredients. Now, in most stations in the game (including the one you are in) you go to outfitting, and in Optional Slots, you will find a section in the store, FSD Boosters. That is what you have unlocked, buy one, fit it.
When you're ready to talk about building your explorer build, give us a list of your optional slots and what you have in them (including any empty ones). You will get a range of advice, the good advice will explain their choices. You also have some travel experience now, so you have an idea what you want to do, so think about that when asking for advice.
I mention this because normally, a compromise has to be made somewhere. You could fit the smallest fuel scoop to accommodate another module, that is fine but scooping will take far, far longer meaning a lot of your game time is eaten up by refuelling.
Anyway, sort the FSD Booster, we'll come back to this.