Prerequisite reading materials and pathway to learning to use the g20 library

[Mechazo11]

Dear g2o team,

Thank you for your excellent work on the g2o library. I've been using it with ORB-SLAM3 for two years and now aim to update its implementation to be compatible with the latest g2o version. My background in mechanical engineering and initial unfamiliarity with linear algebra and C++ made the learning curve steep, but I've since improved. Could you recommend how a newcomer might start with g2o and any helpful resources or reading materials?

Best,
@Mechazo11