I😋 can understand that not everyone is born with a extraordinary voice. Some of us just have to try harder, but its not bad in fact most of the singers you hear a hard working singers who have worked for so long that now they can sing so well.
So with no further adieu i am gonna tell you things that will help you but only if you promise to be regular

1. Practice breathing exercise- Breathing is an important element of singing so take time in the morning to firstly practice them.

2. Practice singing the scales- The scales major or minor are very important, everyday in the morning. You can sing do re mi or just ahhh with them.

3. Drink plenty of water- Always keep a bottle of water with you when you sit down to practice.

4. Avoid screaming- while singing everything will come with time. So don't try to scream and get the notes because all it will do is spoil your vocals.

5. Avoid spicy food- you need to take care of your vocals. Some extra effort wont kill you. Avoid these food items because they will spoil your throat.

6. Just practice- practice. Until you become perfect, for this there is no shortcut sorry.. But you know what the more you practice the better you will sound. And its definitely that no matter how bad you sound if you will practice you are definitely gonna be an awesome singer.