Online courses have their pros and cons at the same time but the no. of pros outweighs the cons if dealt with dedication and sincerity.

Pros -

Can be accessed at any place, at any time

Affordability

Doesn't require any classroom set up

Cutting off transportation costs and the fatigue

Choice of teachers

Repetition on demand

Orients to everyone like students or job holding people

Cons-

No personalised doubt clearing

No peer pressure

No external motivation

I recommend online classes only if you are self motivated otherwise it may not yield fruitful results.