Welcome to res, Vampy, and yeah, we all wish we could hatch more x3.. before a recent (major) update, some users could only hatch once per day! But you can also always buy more from users in the sb (shout box/chat)
It is definitely hard as a new user to try and get things because of how little tu you have! Here are some easy ways to make tu!
Npc quests: you turn in items from npc shops and are given tu. Food and squishy are kind of harder, but the revenue is worth it, especially if you stock up on rarer items.. you can make about 20mil (not including tu spent on the items themselves) from squishy every 2 days if you do all 50 tiers (you can only do 25 a day)
Egg selling: selling eggs is a great way for users with a lot of time! Many people just want to buy fully incubated eggs really quickly to hatch, so selling harder to get eggs like Ardur/Tesuri/Intes (you can see rarity and home planets under creatu species) you could sell for 200k-900k per egg.. even then, sell 10 eggs for 100k and there is an easy 1mil.
Good luck with your dream HA journey, and if you have any questions (or wanna chat) feel free to hmu in chat or send an rmail :)