my garden is not to big so plant that dont consume much space will do
The most important ones are those that you'll eat. Avoid potato and squash, unless you can get the squash to climb; big space users. Small space users are carrots, turnips, beets, and peppers. Tomatoes are fine if you cage them to contain the sprawl. Also consider early and late season veggies so you can grow more than one thing in each space, such as lettuce or spinach followed by tomatoes or peppers. You can also interplant things like lettuce between carrots so as the lettuce ripens the carrots fill in the row. Finally, consider containers, if you can water them every day.
It really depends on what vegetables you like the most. What is important to me might be different than what's important to you. It all depends on your taste. Make a list of what vegetables you like and eat the most. Once you have populated the list with your favorite vegetables, circle the ones you want to grow the most. Once you have those then you can figure out what to grow in your space. If space is at a premium look for compact versions of your favorite vegetables, or vegetables that can be grown vertically ( up a trellis). This saves space because the plants grow up instead of on the ground. Many vegetables can be grown in containers, too. These are tomatoes, cucumbers, eggplant, lettuces, peppers, etc. To save room, if you like tomatoes try 'Patio' or 'Better Bush' - cucumbers try 'Spacemaster' or 'Bush Champion'. The most popular vegetables grown in most home gardens are tomatoes, cucumbers, summer squash, eggplant, green beans, peppers, carrots and greens ( lettuce, arugula, spinach, etc).
