good trade route for beginner?

[Danny-boy]

May I ask what ship, ID, IFF and guns are you using to mine Helium-3?

You should also consider joining an official mining/hauling faction such as the IMG| where people often mine for each other and go on large convoys together to sell the ore and make a good profit. That is a great way to learn some new trade routes, get rich and have fun with a group of friends.