Clytaemnestra imagine you are trying to do the same, except:
You don't have the internet at home so you must go to the library to use it (you cannot afford an internet cafe).
You are not terribly computer literate so you it's not an easy task for you (you also spend some time each week attending a computer skills course).
The kind of work you are applying for is low-skilled and often not advertised on the internet. It's often a case of printing out CVs (eating into your tiny food budget, incidentally) and talking them to employers. You are totally skint so you must do this on foot, rather than public transport or driving.
Your literacy levels aren't great - you have dyslexia which was not diagnosed at school (not uncommon for people in their 30s / 40s / 50s). You feel daunted by large application forms and know from experience that you don't do a good job of filling them out on your own, so you must seek help to fill them in. This takes time.
You also need to fit in other tasks such as food shopping. As you're on such a tight budget, this takes time as you need to shop around (e.g. local market, discount stickers in the supermarket) in order to be able to afford to eat properly. This takes time.
Now, how much time do you think you have for job applications? If you're working full time, how will you get on the internet, or get the help you need filling out forms?