This is THE most welcoming community I have ever been apart of. The game is free to play so what do you have to lose?
Warframe is rather complex and overwhelming when starting out for sure, but this game is truly shocking for how much you can do and not spend a single penny in the process!

Each "Frame" is different (Granted I have not played them all, not even close). The diversity in play-styles that can be achieved is incredible. As well as the Modification to Weapons and your Frame itself though Mods, that drop randomly though-out any given mission

The Game is NOT P2W (Pay to win) it is a "Pay to skip" type system if you are wanting to rush things though, taking your time though-out the game is the way to do it.
The story is a bit all over the place at times. But from what I already completed... I have gotten Sad, Chills, Anger & happiness.

QNA chat has vets on stand by all the time to help answer any questions that you may have, also the Warframe Wiki is a great place for information for ANYTHING that can be found or done in the game. Just be careful to avoid Spoilers as it can happen really easy when going though a Rabbit hole..

I understand that I have not sunk thousands of hours in to the game. I honestly feel like it is illegal to play a game so amazing for FREE!!
Once the game bites you and it pulls you in. Good luck, but it is enjoyable progress.

Platinum is the Premium Currency, and you truly don't have to spend any money on the game, you can make Platinum from selling items to players for Platinum. ( I would avoid trade chat, as you are going to get drowned out, and the pricing is rather bad. Use "WarframeMarket" Very easy to make an account and sell things for Platinum.)