For DEX I would choose Ref_finance because it's new, and solves a lot of issues we face while carrying on DeFi activities. Problems like high fees just like that of uniswap, fast transaction, and seamless user interface which even a newbie can easily access.

About wallet address you can use trust wallet as it's a multi_chain wallet but you need to very careful as trust wallet is getting hacked this days, for me I love the $Near wallet because it's readable, just like ur name. Near, for example Ninabobo.near, I so much love it.