Hi Alan, you shouldn’t seek out stock picking advice online, from me or anyone else. Just to address the matter at hand I would strongly disagree that Tesla is a ‘good solid’ stock, it’s speculative - for reasons well summarised in the video below:
As you are (probably) new to investing I think the first thing to do would be to look at very broad financial education to start with. Before you even start think about individual stocks you should think about your financial goals, which will determine the asset classes and risk factors you want exposure to.
Seek advice of educated professionals who will not introduce their own biases or interests (intentionally or otherwise) into your investing decisions.
These Youtube channels are run by CFAs/PMs/Financial Advisors and answer almost any question about personal finance & investing without recommending a particular stock, manager or strategy, the later two have a UK focus.
Spoiler alert: at this point most resources will point towards broad, low cost, diversified passive equity funds if you have a long horizon and large risk appetite.
Stock Picking
Really there are no shortcuts, stock picking is a zero-sum game with millions of participants collectively spending billions of dollars on research to win. So you need to do your own research, which generally means coming up with a good estimate of the intrinsic value of a company, which most likely means creating a DCF model.
Aswath Damodaran (a.k.a the Dean of Valuation) is probably the go-to teacher for this and luckily he has posted a lot of videos online which will tell you almost everything you need to know. His Spring 2021 course is the most recent and has 28 sessions.
Here’s the start of one of his older series on valuation