Where do I start learning? What books do I buy? - What youtube videos can I watch?- All these questions commonly asked. There are hundreds of resources to learn Samskrutham. As usual there is a problem with abundance - what to choose and how what steps to take.
1. Review the SOPANANI page - that lists the steps that you can go through for starting samskrutham learning or continue where you left off.
2. If you are interested in self learning - then use you may buy books, use the internet and learn on your own, but surely attend a 10 day interactive course and the weekly classes for spoken samskrutham first.
3. Look for Sanskrit Promotion Foundation material on the internet (https://www.samskritpromotion.in/). They have tailored courses for Yoga, Ayurveda, Geetha, Vendanta - which start with sanskrit instruction and the use that to teach the subject.
4. Look for Sanskrit From Home material on the internet (https://sanskritfromhome.in/) - They have some wonderful courses.