Sounds like you had a nasty accident and I’m glad that you’ve recovered well from it (apart from the scar).
Hypopigmentation is difficult to treat and options include:
- medical tattooing
- phototherapy
- scar revision
- laser
Outcomes are variable and I would not get my hopes up too high.
The raised portion is definitely more treatable with injectable steroids, lasers and silicone sheets/gel as you have rightly pointed out.
Nonetheless, it would be best to get it examined by a medical professional so that an appropriate treatment plan can be tailored for you.
All the best!