So, as someone as mentioned, the best way to grow your capacity twice as fast is to go to lightningnetwork.plus and join/create triangles (you'll increase capacity twice as fast as for each channel you open, one will be opened to you).

You can install Lndg and it will suggest you new channels to open.

You can also use the moneni website, it will suggest you nodes: https://www.moneni.com/nodematch