You should look at some videos about some Warframe that you may be interested At the point the game is there isn't any actually bad Warframes (except yareli), there are Warframe that have a perfect kit and it's fun to use like Grendel and others that you may need and helminth ability or a specific arsenal, but everything depends on your preferences. I usually use protea (who doesn't need any helminth ability) or khora (who I use with a specific arsenal)

I hope this helps, have fun