may i ask in which order of the series should i start playing?
In chronological order. You can absolutely play in whatever order you want and Alicesoft was pretty good about not holding it against you if you weren't an ardent fanboy of the franchise but there's tons of callbacks and throwbacks in the games and recurring characters are frequent even if every game is a self-contained plot.
The remakes of 1, 2 and 3 are recommended. The original games should generally only be revisited as a franchise enthusiast, as a curiosity and a time piece of late 80's / early 90's game design. Rance 4 has no remake (and short of TADA coming out of retirement that wont happen) and the existing version is admittedly dated. Can be played as-is but if you need the creature comforts of modern QOL features there is a patch that can be downloaded and applied.
At this point you can also pick up Kichikuo Rance, which was a spin-off intended as a swan song for the company before it exploded in popularity and ended up saving Alicesoft. But it's also a huge departure from Rance titles (being a turn based grand strategy game) and it's non-canonical so you miss nothing in terms of plot by skipping it.
Rance 5D is the only version of Rance 5. The 'D' is because it was the fourth attempt at the game. It is the weirdest title, but it's also short and simple. And you canonically get shit faced with hanny frat boys which will never not be funny. Rance 5 also marks the start of ORION's art direction so it's usually considered the start of the modern games. Also the first time a Rance title wasn't a Windows port of a PC-98 title.
Rance 6 is Rance 6. Fun, but it's usually considered the most difficult game in the franchise.
Then you got Rance 7 (Sengoku Rance.) Draws heavily on design choices made in Kichikuo, it's another turn based grand strategy game. This one gets recommended a lot because it's also the first game most people played when Rance first started getting English language translations. If you see someone saying you should arbitrarily start with this one, that's why.
Rance 8, or Rance Quest. Although it's genuinely difficult to find it without the add-on, make sure you're playing Rance Quest Magnum, and not simply Rance Quest. Magnum dramatically improves the gameplay and adds content, there's objectively no reason to play Rance Quest without it.
Rance 9 is Rance 9. Resolves a series of plot threads started with Rance 3. Don't need to play Rance 3 / 4 to really get it but it is heavily recommended.
Rance 10 is the only game that still doesn't have an official translation (it's in progress) and is also the end of the franchise. Save it for last, you'll probably have the official release translated by the time you're done with the other games.