Most definitely, if only for repairs and alterations.
I love buying discounted pants with legs too long.
I hate throwing something away because one cheap seam failed.
I could ask a family member to sew, but I might not get the item back for a year, heck mom has a new pair of pants of mine from 11 years ago.
Several rules to make sewing easier.
Change needles often, they are cheap but a dull or blunted one will cause problems.
Buy the best thread you can.
If the machine snarles up, cut off thead back to the spool or bobbin, it might be a bad spot or damaged, saving a pennys worth a thread is not worth the greif it can cause.
Keep the bobbin case area clean.
Don't let people play with it.
Practice
If you start feeling stressed out take a break, much better to have a nice cupa tea than spend half an hour ripping out a wrong seam.
Do whats needed to see what you are doing, I sprung for one of those lamps with the magnifing lens, my eyes aren't what they used to be and use it for seam ripping and threading needles.
Avoid deadlines, I haven't yet done a project I was happy with while under one.
A project takes as long as it takes, a well thought out one can seem to fall together.
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Why am I getting old faster than I'm getting smart?