hi i hope this story is not as confusing as it is quite a long and complicated one but i really need some help

1. i have some btc that i wanted to convert into a stablecoin
2. unknowingly, i converted it into usdt (tether) on the eth network
3. now i want to convert my usdt back to btc but the problem is the wallet (exodus) is requiring me to have at least 0.0002 eth for gas fees
4. the minimum eth purchase or transaction is too high on exodus so i had someone send me some eth instead of directly buying or converting some of my other coins to eth
5. now i thought all is going to be well until i see that my eth is on arbeth
6. i checked my eth address that i sent and saw that it is just the same as my arbeth address
7. going back to my original problem, i still can’t convert my usdt to btc because exodus keeps requiring me to have 0.0002 on the eth network
8. i can’t convert my arbeth to eth because exodus says it is lower than the minimum amount needed to make a transaction

questions:
1. why eth and arbeth have the same address and why did it go to arbeth and not eth when the person sent me eth?
2. is there any way for me to convert my arbeth to eth without needing to buy more just to reach the minimum amount on exodus?
3. is there any way for me to convert my usdt to btc with some reduced gas fees?

pls help me thank you!