I can’t see anyone else having said this: get old sheets or other cotton fabric - charity shop will do - cut into pieces you can handle easily, not too small but not the whole sheet, and just practice sewing on them. That will get your eye in for following the seam guide, doing straight lines, knowing the pressure of your foot pedal and so on. you can even do this without thread, just to get used to the feel of your machine, its speed and so on.
For actual techniques, Fashion Sewing Tv on YouTube is really good. Her explanations are excellent and her camera work is really clear. She is who I check first when I need to know a thing.
Tips no one ever mentions:
When you’re turning the hand wheel manually ALWAYS turn it towards you.
Put a piece of paper under the presser foot when you’re changing a needle. That way if you drop it, it won’t get lost in the body of the machine.
Use the right needle. And change it frequently. Some will say every 8-10 hours of sewing time, others after every project. In reality, you won’t need to change it after every little sleeveless top you make. But keep on it and change regularly.
if you progress to clothes, buy patterns and fabric you actually want to wear. There’s no point in buying the popular pattern if it isn’t something you want to wear, no matter how cute it is!
Pattern sizing is not the same as high street clothing shops (because they’re all so consistent 🙄) so get a new tape measure and measure yourself. Then compare it to the pattern measurements to choose the right size for you. It doesn’t matter what those measurements are, everything you make will be you-sized.
I started 10 years ago! Now it’s my favourite hobby and I’m deciding what I’m going to be making for autumn and winter.
It’s not ‘easy’ but it’s not hard either. It just takes a bit of knowledge and practice. That’s all! And the sewing police won’t be watching your every stitch, it doesn’t matter if you do it wrongly, or slowly!