I want to create a route but I'm not that good with lidar data, maybe someone knows how to build a route without lidar data?
Yes, you can simply use the SRTM data (hgt files) to create a landscape. You can download these within QGIS and the STM download tool or a website. SRTM is the low resolution height profile with 30 meter resolution. Lidar generally offers higher resolution of up to 1 meter. So, you don't need Lidar files to create a route. It's better because it offers a more detailed landscape but not necessary.
https://forums.dovetailgames.com/threads/unofficial-terrain-creation-guide-for-beginners.75275/ https://forums.dovetailgames.com/threads/editor-documentation-collection.74478/