I'm a careful person with my diet and my foodhen it comes to my diet.

Adding onto what PacificOcean wrote, if you want to keep "I'm a careful person," this is another way to write it and make it not weird anymore.

I love each time when we planned with my husbandmy husband and I plan to go out and eat Sushi in a restaurant, but I would like to learn how to prepare in ourt at home.

At the start, I think using the phrase "my husband and I" is what you need. This is a common way to put things: "my friends and I," "My parents and I," etc.
Instead of in our home, at home sounds more natural.

Each time that we triedy Sushi in a restaurant, it is always good (without cream cheese, we don't enjoy its flavor).

Since the second half of your sentence, where you describe the sushi, is present tense, the first half should be too (past-continuous). So, if you write "each time that we TRIED sushi restaurant," you should follow with "it WAS always good." You just have to keep your tense consistent.

So, it would be a good dish to add to our diet and it would be how to have a Sushi Restaurant at home.

I'm not sure what you mean to say with "it would be how to have a Sushi Restaurant at home." I would want to write something like this: "So, it would be a good dish to add to our diet, which would mean making our own sushi restaurant at home!"

Before, when we had lunch, we only ate two different meals: chicken or fish.

Or "When we had lunch before," (just so that you don't have two clauses right at the beginning)

I Would Like to Learn How to Makes Sushi

I'm a careful person with my diet and my food.

1. “I’m a careful person” sounds a bit strange here, saying “I’m careful” sounds better
2. “And food” sounds odd at the end so you can just take it out

I love eachvery time when weI planned with my husband to go out and eat Sushi in a restaurant, but I would like to learn how to prepare in ourt at home.

1. “When we planned” implies that you and another person planned to eat along with your husband. You haven’t mentioned anyone else, so I’m assuming it’s just you and your husband. You should instead say “When I plan with my husband”.
2. You need to add “it” after prepare to follow English’s basic sentence structure of “Subject + verb + object”. The word sushi is the object in this sentence, but you’ve already mentioned it for you can just say “it”.
3. “At home” sounds more natural

Each time that we tried Sushi in a restaurant it was always good (delicious (but not without cream cheese, we don't enjoy its flavorlike it).

1. Since you’re talking about the past, you should use “it was”
2. “Good” works, but you’ve already mentioned should try and use some more descriptive words for food like “delicious” or “tasty”
3. “We don’t like it’s flavor” sounds a little odd, you can simply just say “we don’t like it” or “we don’t like the way it tastes”

So, it would be a good dish to add to our diet and it would be howcool to have a Ssushi Rrestaurant at home.

1. “Sushi restaurant” doesn’t need to be capitalized, as you’re talking about sushi restaurants in general, not about a specific restaurant