If you don't know whether Lightsail is suitable for you, my experience may given you some reference.
I would give the answer first: Lightsail instance is very easy to crash.
I developed a small blog, which has about 500 posts before migration to Lightsail.
after consideration, I bought the instance with bellow configuration:
Not stable as I expected. Before I migrated to Lightsail, I was using a VPS with only 1 Core Processor and 2 GB Memory, it has never crashed once !
reason of migration to aws: I want better network performance for my site by choosing a AWS node close to my clients.
So what I've got? Spend more but get an unstable server.
here you can see from the screenshot, I rebooted 6 times in 12 days, every reboot means my site was unaccessible, neither could I connect to my instance with SSH.
At first I thought it was my problem, like heavy query or something, so I tried to optimize my query methods in my project, and cached as much content as I can to reduce the pressure of my server's CPUs. But, It still keep crashing …
Then I googled and found some people who deployed their Wordpress sites to Lightsail also have the same problem.
So I know AWS still haven't solved this problem for Lightsail.
now I'm considering a new migration at the end of this month~
I've migrated to a new EC2 instance (m6a.large type) and deleted my Lightsail instance, till now the EC2 instance's performance seems to be better than the Lightsail instance, we will see.
And of course, the price of m6a.large of EC2 is higher than Lightsail.
hope it will be useful for you.