I play the english version, you can download it here (or here , if iOS). About the differences, the EN version is about 2 years behind the JP one, however, it is following the JP schedule pretty faithfully (as far as I know), so plenty of people manage their resources based on that.
FGO actually have it's own wikia as well, although it's mainly (if not completely) for the JP version, but even so it is still pretty useful. For now I only have the wikia link, but I do know that there are other guides... Are you familiar with 4chan?
Humu... well, it is indeed pretty F2P friendly, no doubt about that, since you can pass pretty² much everything with just 3★ Servants (there are exceptions, of course), however, the gacha can be pretty³ brutal, so if you want a particular 4★ or 5★ Servant, the RNG might not help you (which makes me wish for every game with a gacha system to be like Aigis and have a guaranteed 4★ and 5★ every X pulls...)... but obtaining Summoning Tickets and Saint Quartz (the Sacred Crystal equivalent) isn't very hard, and again, we can predict when which Servants will have rate ups, so deciding who you want and prepare for them may prove effective.
Don't worry about that, it's always good to see people interested in games you like. Actually, I'm the one who should be apologising, for rambling in my explanation, but I hope it's understandable.
And about the 4chan, you don't really need to go there, but I heard that there's a Fate thread on /a/ and there might have links of other guides (but if you like Yuri, there's a thread on /u/ as well, if anything, you might at least get some tips).
PS: If you want, post your ID here later and I'll add you.
I made a little search already and found minor info in 4chan as i'm not used to it, but i found a lot of helpfull info in the FGO reddit and although i got some trouble while installing the game, now i can play it well and tomorrow when i level up a bit i will uptade this.
Just wanted to give you a insight of my progress after playing for a month and again thanks for all the help.
I luckily got Raikou from the gacha in the middle of the Onigashina event after pulling before i sleep, and now thanks to her i got almost everything i wanted from the event shop :)))
I'm really happy with my progress, happy with my first ssr pull and from the servants i could ascend, it's a similar feeling from having your units in aigis aw and saw, it's really cool to see your characters getting strong and right now i got addicted to FGO xD.
So sorry for this happy pull text out of nowhere but thanks again for the help in starting, and i'm looking foward in someday being able to help you with my units. ^-^
Humu, let's see if I can explain in a acceptable way: Firstly, click on the "down" arrow on the right of the "Edit profile" button on your profile, and then click on "Classic editor"; This is the code you'll use:
Just copy and paste it on the classic editor and replace the "X"s for the values you want. Most of the sections are probably obvious, but just for completation's sake: name= Unit's name; Level= Unit's level; rank= CC, AW, AW2, AW2v1 or AW2v2 (if the unit is not CC'd yet, you can just erase the "rank" section); skill= Unit's Skill Level; cr= Unit's Cost Reduction; To add more units, just copy the second line and paste it right below of itself, but always above that third line (since it ends the list). Also, on my profile there's just Blacks and Platinums, but you can add any rarity (I myself will add the others on my profile in the future... at least the Golds)
That's about it, as you can see, this little guide(?) is just for the list, if you want to hide them as well, just ask and I'll try to help.
PS: I don't know if it was a good explanation, so if it wasn't, you may want to ask Kkentauro, since they are the creator of this code. See also: Code's thread
I'm just assuming you also want the "Black" image on top, but if you don't, just remove the middle line from the top list code. Also, to do the Platinum (and other rarities) one, just reclace the "Black" for "Platinum" at that same middle line.