Path to SDE

Been working in data space(BI/Data Engineer) for last 6 years. Thoroughly into building data pipelines in Hadoop environment and been building Infra in AWS for last 2 years. Job involves heavy scripting in python and other database tech. Background is in CS but got stuck in database career due to the first job. Should say I lost my touch with Data structures and appl building(read coding in Java) but have a strong belief that I can pick it up if I put effort. I think I have an opportunity to convert into SDE role within the team. What is the right way to get about the opportunity. How long should I give myself in this path. If I make the move, I am looking at becoming SDE2 from DE2. TC - 170k