ChainShot (by Alchemy) I got rather lucky to find ChainShot before it was rather hidden from sight, but it paid off very well. This platform has apart from Solidity intro also courses on Aave, Chainlink, and Ethers.js and soon they should be launching Ethereum Dev Bootcamp. On their website here you can set up an account and dive into interactive exercises to learn about all the stuff. My experience with the Solidity course is incredibly positive. It is well made, explains complex and complicated topics in a simple way and as the topics are divided into smaller chunks, it is well digestible.

I highly recommend you try this one out if you want to know what to expect. Link to ChainShot courses.

Alchemy University and Road To Web3 Alchemy recently opened early access to its Ethereum Development Bootcamp and Road to Web3 courses. I applied about a month ago, got accepted a few days back, and now awaiting the first content to be released. However, there is a ton of things to do before that for both beginners and more advanced programmers. Beginners may start with the JS course and advanced (or those who want to dive into it straight away) can start building projects.

Link to Alchemy University.

Link to Road to Web3 projects.

I highly recommend you join the Discords as a ton of information is there for you to read, and expand your knowledge but also get help in case you are lost. The community is huge and very active so you won't regret it!

Udemy — Ethereum and Solidity: The Complete Developer’s Guide (paid course) If you want to start working more on your local computer than with contracts in Remix IDE, this course works with technologies such as Truffle, and Hardhat, that allow you to run and deploy smart contracts from your computer. This course is a bit more advanced, but no need to be worried. The pace is great, the explanation is detailed and the majority of the important stuff is done over and over again so you get it under your skin.

Link to Udemy course.

As apparent from the headline, this course is paid. Udemy does from time to time offer discounts of about 70–80% so in case you are interested, you can give it a shot.

DAPP University I believe you might have heard about this before, however, this channel offers a good amount of content related to Solidity and blockchain in general and might be a good starting point for many. I especially liked the 90-minute introduction to Solidity that provides a great insight into Solidity in a short time, uses great examples, and helps a lot to get hands dirty using Remix.