Hi.
I started in bitcoin 1 year and a half ago, and i bought a few satoshis (not a lot, just to know what crypto is all about). I had it in the exchange i bought them from, but recently i decided to transfer them to a software wallet. I started learning about wallets and i came to this problem.
RIGHT NOW, I HAVENT MOVED MY SATOSHIS FROM THE EXCHANGE YET. ALL I HAVE DONE IS "playing", "testing" IN TESTNET (BTC for testing).

1. I made a test wallet in GREEN WALLET for android. i got some btc from the faucets. I made 2 wallets: one with 24 word seed and other with 12 word seed. i tried sending some satoshis from one to the other and viceversa. EVERYTHING OK.

2. I made a test wallet in WASABI WALLET for windows 10 (with a passphrase (lets say the passphrase is Helloworld) and a 12 word seed). i got some btc from the faucets, and i tried sending some satoshis between the wallets from WASABI and GREEN wallet. EVERYTHING OK.

3. PROBLEM 1: I tried to recover (back up) a wallet from green wallet (Android) in wasabi wallet (pc) by  recover wallet > write the 12 words seed and i couldnt (0.00BTC in the wallet "recovered". Then i tried to recover the other green wallet in wasabi wallet with the 24 words seed. Same problem:0.00 BTC. What is my mistake? Is it even possible to recover a green wallet in wasabi wallet (i mean, to recover a wallet in a different wallet like wasabi?). PD: I made sure both wasabi and green wallet were in tesnet mode.

4. PROBLEM 2: In wasabi, i deleted the folders of all my wallets and tried to recover them by recover wallet > write 12 words + passphrase and after 1 hour, wasabi wallet hasnt shown me my wallet, only a blue cicle with spots like if it was "loading something". i dont know whats happening.
Whats the way of deleting a wallet from wasabi wallet and how can i recover it with the 12 seed +- passphrase???

If i understood it well, with the 12 seeds +- the passphrase i could recover any wallet, even if i lost the computer or the smartphone i had the wallet.
I WANT TO TRY EVERYTHING IN THE TESTNET before trying in the real btc chain...

Remember that im new!