Warframe isn’t that complicated, it actually has only few damage types - slash, heat, viral, radiation and toxin. And even than last 2 are very niche. Maybe gas for some weird perverts.
Jokes aside, it’s hard to judge, I started Warframe as poor student, where I had plenty of time scrolling wiki for info during some worthless lessons, but even than, I’ve never been a no-lifer, I reject to become tubemen, living hours in Void during Void Keys, I’ve never played fantastic four (Khora/Necro/Speednova/PullMag) survival setups for hours and so on, I’ve never been efficient player. I just played at my pace and had fun. I probably still have over 50% of playtime on Oberon and Valkyr.
That being said, Warframe is just MMO, with grind being the main game mechanic (Only MMO that have no grind are things like dota or counter-strike, but normal people really should avoid such things at all costs). If you don’t have enough of time to play Warframe, it really can become frustrated, I understand. Warframe is informational dumpster, it has a lot of info, but plenty of this info is not important, you just have to know efficient (to certain degree) ways to skip tedious grinds (leveling stuff in Sanctuary Onslaught, farm credits in Index, use Smeeta for resource farming etc). And Warframe isn’t pvp game, there is no real competition between normal players, there is no difference between players dealing 90% and 10% total damage. A lot of good players doesn’t mind carry weaker players on complicated content like Eidolon , Archon hunts, Profit-taker fights etc.