Each number is typed by the finger that types the letter below it. The number row is a long reach, so return to the home row after each number until it feels natural.
Index fingers reach two rows up. Left index types 4 and 5, right index types 6 and 7.
Middle fingers reach up to 3 and 8.
Ring fingers reach up to 2 and 9.
Pinkies reach up to 1 and 0. Now you know the whole number row.
Mix numbers and words like real text.
Symbols are Shift + a number key. Use the Shift key on the opposite hand.