Really depends on what you'd want to use the trailer for. My previous car had a similarly low tow rating, I've got an Erde trailer that weighs only about 220kg empty.
Has worked very well for me when I did solar installations back in the day when systems were a bit smaller than now. 15 panels (~200W back then) and an inverter, still well below 500kg all up.
Same trailer was more recently converted to a DIY camper trailer. With rooftop tent and pull-out camp kitchen it comes to about 300kg, leaving 200kg for 'load': camp chairs, table, cooker, gas bottle, food, water, jerry can.
Getting gardening supplies: those box 6x4s they supply for free, filled with mulch, should be below the limit. Filled with sand, you'd have to go separately for each scoop.
Getting home a large screen TV from the Good Guys, or a mattress and shelf from IKEA: easily below the limit.
Lots of stuff you can do, that's why I'll get the tow bar fitted on my new ZS EV once I get the car and the tow bar becomes available here in Australia.