Help me buy some basic equipment?

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I'm 47 and never been a great swimmer but like doing it
cause it makes me feel so limber

having said that I wish to purchase a set of goggles
and a swimmer snorkel (center mount) for use in the
pool outdoors.

Should I get goggles that only cover my eye socket?
Or some that cover my nose as well as eye sockets?

And the reason I want the swimmer snorkel is that my
breathing tech is not proper yet. With the snorkel I
could keep my head.face down in the water ad at least
swim laps and get upper body workout

And....would buying some shorty training fins be a good
idea?

Thanks in advance!