I've reached 30 billion now and was wondering what you do to swap over to trader?
I was thinking of just setting up trader and then running it with the orders I already have set up.
Or is there a better way to do it ?

Trader's account require standings at least 8 to caldari state and caldari navy. Run courier for a while or set trader with courier addon activated if your standings at least 5, so bot can level standings and run trader in meanwhile

I have +10 standing to Caldari state and full 5 for all trader skills.
I Started with auto trader and 10 billion now I have 33 billion using it.
The question was - is there any tips for going from auto trader to standard Trader now I have over 33 billion ?
You said auto trader is good for up to 30 billion so I now want to swap to Trader and wanted to know if I need to sell everything or just leave the buy and sell orders as they are and just run Eve Trader?

30b is approximate value. Set max buy order size to 800m and if you see that bot do not distribute all ISKs in a week, you may switch to standard trader.

First of all activate autotrader bulk seller mode and bot will install all items in inventory possible to sell with profit. After a day sell all remaining items manually to buy orders. Choose items to trade with standard trader (fill buy and sell order tables) and start.