[dtagames]

Blender is terrific, free, and has lots of community support. It also has a famously steep learning curve, a complex UI, and poor documentation.

If you're new to 3D tools, I'd recommend finding a Discord where you can converse with other users live. The help will come in handy!

[pollilop]

and do you know is it possible to buy 3d models for some bikes on blender?

[dtagames]

3D file formats are fairly standardized, so you can buy 3D models anywhere those are sold and import them or convert them to a format that can be brought into Blender.