Yes Bitcoin core is required. It's the center of bitcoin transactions. Lightning depends on bitcoin core. Why?
When you open channels with peers on Lightning, the onchain funds needs to be registered how much was added to the Lightning network and vice versa when you close channels. Before you open a channel, for self custody like albyhub, do yourself a favor and read as much as you can on alby documentation. Pages. Watch videos about lightning on YT.
For the time being, there are still custodial lightning wallets arround to receive and send zaps.

When I started to learn about Lightning, I tried to do quickly without understanding it but then there was not much easy solutions and this results in lost funds.

So, you're lucky there are guides to diy your lightning wallet in no time.

But keep in mind, you need sufficient funds to open channels. And do not open channels when fees on chain are high!