1.) Got myself two Kayacats (https://www.kickstarter.com/projects/1037377909/kayacat) after renting Kayaks from time to time for a long time. Kayacats seem to be discontinued, but I love getting just on a train with a backpack and just spending an afternoon paddling downstream on a river to the next train station. The only effort required is planning the trips, preparing a picknik. Nothing much to develop.
2.) Got a velomobile (https://www.velomobileworld.com/product/milan-gt/ ). This was actually not supposed to be a hobby but a way to get to work while not producing too much C02. 50km each way were to far for a normal bicycle, an ebike is still to slow. With the velomobile I could average 40km/h and stay fit at the same time -- until Covid/Home Office came along. This year I took some time off and cycled 11000km in 3 month. From Northern Germany to the Black Sea, to the Atlantic Coast and back to Germany again. This took some time and effort ;) But with cycling you can spend as much time/effort as you please. You can tour alone or in groups... many options.
2.) Got a velomobile (https://www.velomobileworld.com/product/milan-gt/ ). This was actually not supposed to be a hobby but a way to get to work while not producing too much C02. 50km each way were to far for a normal bicycle, an ebike is still to slow. With the velomobile I could average 40km/h and stay fit at the same time -- until Covid/Home Office came along. This year I took some time off and cycled 11000km in 3 month. From Northern Germany to the Black Sea, to the Atlantic Coast and back to Germany again. This took some time and effort ;) But with cycling you can spend as much time/effort as you please. You can tour alone or in groups... many options.