first time abroad, going to denmark solo for work… help me not fumble

hi guys im a 21F from india traveling to denmark for the first time for work. going solo and also my first time in europe!!

what are some things i should keep in mind? like basics i might miss out on.

also any cultural sensitivity things i should know about? don’t want to accidentally be rude or off.

what kind of clothes should i pack for late april/early may weather there? not sure how cold it actually feels vs what google says.

and last thing, any nice souvenir ideas i can take from india for the people im meeting there? something authentically indian thoughtful and a bit fun. ( but idk what they'll like)

also i kinda want to make a good impression on the people there so anything that helps with that would be great.

thanks :)