Hello,
.
You have many routes to become a physicist but you should be working hard enough to be a physicist.
.
Every route takes too long.Have enough patience to pass it.Here is what  you can do,
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1. For for JEE and choose engg in physics and go for PHD.
2. Choose BSC after clearing it go for MSC then clear GATE and join PHD
3. Do integrated program in the IISER, clear gate and go for PHD.

In simple,

• get a degree with physics,
• do an internship,
• finish your master's
• clear an entrance exam
• Get a PhD from

These are  the routes you can choose, and be a physicist.
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Best of luck

Hey there

In order to be a good physicist you'll have to do bsc in physics first. Since there are various Institutes in India and for BSC the quality of education is low so i advise you to join good University as bsc will be your backbone. After that you should do your masters and then PhD. For PhD either you go for foreign universities or IITs, IISC.

Good luck