this article on the pentapixel might be useful
https://petapixel.com/2016/09/14/20-composition-techniques-will-improve-photos/
you can go to monseur google and ask him "composition tools in photography" and lots and lots of pages popple up
you will probably recognize most of them, including some suggested here in this thread...
you might also go back to the photographs you took and decide why you don't like them and why you took them
do they not give you the "feel" that you were there?
were they too close and your subject couldn't breathe?
too far and you couldn't see what you took the photograph for ( subject drowned out )?
i've found travel photography to be kind of hard because if i have never really been to wherever it is that i have travelled
to, i am kind of overwhelmed by the place .. but if i go out and
wander/safari on my own i can find the little things that i might want to remember like a shadow or weeds growing out of the street
or manhole covers or whatever, ...
Print big, show to others and insist on responses having given them no hints.
Composition is not a way to make worthwhile photos. It's incidental and often a distraction.
save your money if it was me,
i wouldn't show giantversions of your photography you don't like to people
unless you have
nerves-of-steel, a
fat-wallet ... and a
sucker for punishment you know, you don't mind
someone saying "these are terrible, why did you print them so big, it must have cost a fortune making such giant prints, and by the way why the hell are you showing them to me?!"
then again you could always say with with those steely nerves
"buzz off buddy, i don't like these photos either i just wanted to get your response "
good luck + have fun!