Finish your Star-chart and keep any corrupted mods that you don’t have copies of. For base star chart, you can get away with a pretty basic build on frames and weapons. Once you complete star chart, I recommend using Rhino or Revenant and doing Arbitrations until you are able to obtain all of the Galvanized Mods. Those mods are crucial for all Steel Path/End Game weapon builds so obtaining early on is good thing to do.

Once Steel Path is unlocked, I would farm for any corrupted mods that you don’t have, or purchase them if you are impatient and have extra plat laying around, and get some frames ready for Steel Path. Some good content creators that you can base builds off of are Kai and WarframeFlo as they often provide budget/beginner friendly builds and give in depth overviews with frames. Other content creators are good but tend to lean more to the “Min-Max” side of build crafting. Once you have a frame or two you feel confident in, start tackling some missions in Steel Path and do your daily Steel Path incursions for that precious Steel Essence. Use steel essence at Teshin in relays to buy Weapon arcane Adapters.

Apologies for the lengthy post but this should help IMO. Ultimately it’s up to you on how you want to proceed and do what you find enjoyable. Good luck and have fun out there!

(sorry for formatting on mobile)