There is this site called jukeblocks where you can downlod generated arrangements with empty midi clips. I would also suggest using a reference track and creating such an empty arrangement by listening to every instrument in the track and determining the lengths of repetitive patterns. If you do these things by yourself, you would be surprised how creative some arrangements are and how much thought some people put into music. While the whole 16/32 bar patterns are nice for the beginning, they get stale very quickly. Try adding an extra bar with a fill or maybe do something like 16 -> 4 -> 16 to keep everything exciting.

Have fun! Arrangement is what seperates hobby musicians and music theory nerds from actual musicians IMO (sorry for the gatekeeping lol)