Paying $210/month for a 2018 Honda Accord & 2020 Mazda CX-30. How can I lower this premium? ​

​I feel like there might be room to save.
​The Vehicles:
​2018 Honda Accord: (Comprehensive/Collision deductibles at $1,000)
​2020 Mazda CX-30: (Comprehensive/Collision deductibles at $2,000)
​Current Coverage Limits:
​Liability: $50k/$100k Bodily Injury | $50k Property Damage
​UM/UIM: $50k/$100k
​PIP: $3,000 (with $0 deductible)
​My Questions:
​Deductibles: My Mazda already has a $2,000 deductible. Is it worth going any higher, or is that the "sweet spot" for savings?
​Coverage Limits: Are my liability limits ($50k/$100k) considered too low or just right for these types of cars? I don't want to be underinsured, but I want to save money.
​PIP/UM: My PIP is at $3,000. Is this a standard amount, or is this an area where people usually find savings?
​Carrier: Should I shop around? I've been with my current provider for a while.