I worked at a gasoline stand station because there is one near my house, and it seemed like an easy job. I worked at a gas station because there is one near my house, and it seemed like an easy job.

Some other synonyms here: https://en.wikipedia.org/wiki/Filling_station It sounds like "gasoline stand" is correct as a translation of the Japanese, but I haven't really heard it used elsewhere.

I worked at a gasoline stand station because there is one near my house, and it seemed like easy. I worked at a gas station because there is one near my house, and it seemed easy.

I think it should be: "seemed like a (noun)" "seemed (adjective)" Easy is an adjective, so "it seemed easy." You could also say "it seemed like an easy job" because "job" is a noun.

However, it iwas hard for me to work there. However, it was hard for me to work there.

You don't work there anymore, so this should be past tense.

I always had to stand outside anytime. I always had to stand outside.

Or: "I had to stand outside all the time." "Always" and "all the time" mean the same thing, so you don't need both.

I always had to stand outside anyll the time. I always had to stand outside all the time.

Added toTo make the situation worse, there is awere few customers, so I was so bored. To make the situation worse, there were few customers, so I was so bored.

"A few" is used more in place of a number, whereas "few" is used more to indicate how little of something there is. This might be helpful: https://dictionary.cambridge.org/us/grammar/british-grammar/little-a-little-few-a-few

Added to the situation, there is a fewwere few customers (OR "there weren't many customers"), so I was so bored. Added to the situation, there were few customers (OR "there weren't many customers"), so I was so bored.

few = 少ない a few = 数人

I had worked there for a year, and my next job is delivery ofing pizza. I had worked there for a year, and my next job is delivering pizza.

I had worked there for a year, and my next job is delivery ofing pizza. I worked there for a year, and my next job is delivering pizza.

I have worked at the place since quitting the gasoline stand station. I have worked at the place since quitting the gas station.

I have worked at the pizza place since quitting the gasoline standmy job at the gas station. I have worked at the pizza place since quitting my job at the gas station.

I will do my best here byfor the time-being. I will do my best here for the time-being.

I will do my best here by the timeuntil then. I will do my best here until then.