What is the deference a validator n delegating

is it validator needs to download some software node on PC ,
n is delegator like the testnet coston on trial 25 feb ago as it the same when goes lives,
im not sure it works ,i’ve watch some youtube how it works on metamask still confuse ,
so i now try on test ftso site is it ok ,the flr network last week say temporary stop for 2week or so,
so maybe i just to practice is it ok to?