You're too late to start using LN because if you make a transaction today with the current network you still need to pay a high transaction fee before you can have a channel.
If that's the case then I can wait for the removal of congestion in the BTC network, and when the fee will come back to normal I will try to open a channel. By the way, I did not know the initial fee has to be the same one that other network users are paying, your point made me realize that (hehe).
It seems the mempool.space is down I can't access the site it might be under DDOS attack or the site already reach the hosting limit because it stuck at "error time out".
I am replying quite late to you, If there were any errors, they've likely been resolved by now.