Each column below references functionality within SciFinder-n and a free database/tool that replicates the same functionality.
SciFinder-n is the completely overhauled version of CAS's Sci-Finder which debuted in Summer of 2021. In SciFinder-n, you can explore compounds, substances, bioactivities, literature, and data sources
Training on using PubChem is available at https://pubchemdocs.ncbi.nlm.nih.gov/tutorials (Tutorials) as well as on the National Library of Medicine's YouTube Channel (https://www.youtube.com/user/NLMNIH/search?query=pubchem)
Inciteful.xyz is intuitive for the initial search. However, to take advantage of the full capabilities in Inciteful will take time.
LitMaps similar to Inciteful.xyz in that you can get started and figure out how to use it with little to no training. However, to take advantage of the power behind the simplicity, I would advise deep diving into training and/or seeing how others have used the tool. Check out the videos on the LitMaps YouTube channel at https://www.youtube.com/channel/UCXR6ETBi7ZZKLFE_7ongiTg.