There are many factors to consider when choosing a guitar slide. The type of slide you choose will affect the tone and sound of your guitar. Slides come in different materials, including wood, plastic, and metal. 

When you are choosing a guitar slide you can see that it has a coating that changes the sound they produce. You also need to consider your playing style and the type of music you want to play. If you are new to guitar, it is important to choose a slide that is comfortable for you to use.

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1- Select a great slide. The slide you choose should be the perfect size for you Just comfortable, not too tight, and also not too loose.

2- Try a relaxed posture. Make sure you find a comfortable place to slide in slide in. Tension is not a good idea.

3- Use the correct action. Make sure to use a setup that has a slightly higher action, which means there's a lesser chance that the slide will hit upon the frets. Use a gentle touch to the strings using the slide, but don't put too much pressure on them.

4- Choose strings that you are comfortable with. Strings are generally an individual choice and comfort, so choose strings that are suitable for you. 

5- Begin by playing one string. The first week you're playing slide guitar, you should only play with the string that is on your instrument. Place yourself on the 5th fret and play between the frets, striving for a clear tone.

6- Do practice. There is no shortcut! Keep practicing until slide guitar becomes as natural for you to sing. Be sure to take time to listen to lots of music for the slide guitar.