It is entirely possible for you to find a lead guitar lesson on the internet that can really help you to become a better player as long as you are willing to put in the practice. Playing this position in a band is very important so it does mean you have to be completely confident in your ability which is why you must put in a lot of work so that all of those chords become second nature to you.
First of all in your search you must consider the level you are at with your playing as clearly there are going to be lessons on the internet for absolute beginners to those that know the basics and up to average level musicians. Make sure that the one you settle on is for your level as clearly you do not want to try something too complex for you too early on.
Do also make sure that it is a lead guitar lesson as it is a very specific role so the things you need to learn have to reflect that. You are going to be doing more complex things than a backing musician so the series of scales or chords have to be taught in a different way so you can move between them quicker and more easily.
If there is a video of it then see if there is also a written step by step guide so you can be sure that you are doing everything correctly. This is important because it is very easy to pick up bad habits and if you then go and find a music teacher they are going to need to spend a fair bit of time getting rid of those habits rather than teaching you.
Practice really does make perfect so once you have picked up what they are trying to teach you it is then up to you to put in the effort of going over it time and time again until you have mastered it. The good thing about looking for lessons on the internet is that you can go back and listen to it again should you have a problem although the downside is that you cannot call them up in order to get some help.
It is a lot easier if the one site has a series of videos that can take you right through the various stages from beginner to having a firm understanding of the basics. It should therefore begin with relatively simple solo techniques and then progress to more complex solos but in easy to follow steps and at a pace that is comfortable to you so this should be no different to having lessons from a music teacher.
Of course you should not try these lessons until you are able to do the basics of playing a guitar so if you have not yet done this it is best to forget the idea of being the lead until you know at least the basic chords and can play them well. A lot of the online lessons are going to automatically assume you can do the basics which is why they are not going to mention anything about it.
So it is entirely possible to get a lead guitar lesson on the internet but only consider trying to learn this once you are able to do the basics when it comes to the most popular chords. Do also try to get a series of videos from the same people that can take you through the different stages of learning this role as at least then this gives you continuity with being taught by the same person from beginning to the end.