Ready for some adventures ! Also need some advices about my setup

Just finished buying all the gear and setting up my bike for some adventures!

I’ll soon be going on a 4-day trip from France to Spain. Do you think the gear I have is enough, or should I bring more? Maybe a handlebar bag?

I’m also planning a longer trip this summer (maybe 2 to 3 weeks), so I’ll probably need more storage. What would you recommend? I’d prefer to avoid a bulky setup — something practical and streamlined would be ideal.

Thanks for your advice!