New Player looking for Advice

[mamorion]

So I am a big 40k-Lore fan for years now, but never got into playing the game. I am a pretty poor student though, so I decided that I would first try out the game with some 3D-printed models before I spend a ton of money on actual minis.
I picked the Tyranids, because I am not very into Space Marines, and I was able to find a lot of free models for Tyranids.

My plan is to put together a 1000 Point Army now, but because of my limitation of only using free .stls means that I dont have access to all units.

So here is where I could need some help from you guys: With the following units available to you, how would you build a 1000 Point Army (If there are Units where you think that they could proxy for a similar unit, I guess thats fine too)?

Units:

Barbed Hierodule
Exocrine
Hierophant
Hive Tyrant
Hormagaunts
Maleceptor
Ripper Swarms
Scythed Hierodule
Termagants
Tyranid Warriors With Melee Bio-Weapons
Tyranid Warriors With Ranged Bio-Weapons
Trygon

So yeah, what would you come up with for a 1000 Point Army with these Units, or Units that I yould use these as Proxy?

Edit: If you think I am missing something super critical, I can also see if I can't find it somewhere.

Greetings,
Mamorion.