Decluttering Thunderbird/other alternatives?

[Linux for blind general discussion]

So is there a way I can declutter Thunderbird to be simpler/easier to 
navigate? I don't /need/ Lightningtaking up space, or having to tab 
twice in writing a message to get to the subject field.

So can I do anything to declutter Thunderbird. Or are there any 
alternative email programs that are just as good as Thunderbird that 
work great with Orca?