Hello Vixiara!
Here are some different tips depending on where you are in your journey as a sound designer.
If you're a complete new beginner to sound design, try downloading Reaper (you don't have to pay to use it). This is a great Digital Audio Workstation that I and many professional sound designers use at work day to day. There are lots of great tutorials on Reaper on YouTube that you can find.
Sound Design doesn't mean you have to record everything from scratch - although that's really cool if you can do that. But sometimes we don't have a lot of time to do so and that's where Sound Libraries come in.
However, they can get a little pricey, so to start, try downloading lots of free sounds from 'Royalty Free Sound Effects Archive: GameAudioGDC. Then, just grab some clips from any videogame trailers or cool gameplay footages, mute all the audio, and try your hand at placing sounds and making it sound cool.
You're also going to want to get your hands on some essential plug ins, like a good EQ, and a reverb plug in. Even for those, there are some great and free plug ins out there.
If you're someone who are set on becoming a videogame sound designer, and you know that you want to work at a certain company, (For example, for me, it was always League!), try following the advice "Do the job that you want to do". Simply, reverse engineer and think and figure out what a League Sound designer's day to day life would look like and what they need to do each day.
If you want to work on League skins, your job is to replace the Base sounds and replace them with your own sounds - kind of like what this person did with Sett in the video. I'll use Bee Blitzcrank as an example, because that was my last skin that I worked on. I had to come up with completely new sounds for Bee Blitzcrank's AA, Passive, Q, W, E, and R, by taking bee buzzing noises, goopy splattering sounds to mimic honey, and other things! I then implement them into our Audio middleware (Wwise). Then, I playtested it in game and kept re-iterating and polishing until it shipped. Lots of feedback is given from the rest of my audio team, and then when I feel it's ready, I say it's good to go.
If you want to work on Champions - (I'll use Smolder as an example, that was my only Champion), which is a little harder than skins - since you're coming up with completely new sounds from scratch. It's important to talk with the designer and figure out what their intention is. What the power fantasy of the chapmion is, and dive deep into the lore and figure out what their power source might sound like. Then you take a couple weeks exploring new sounds that feels in line with the rest of Runeterra, or maybe even something completely new! Eventually, I made AA, Q, W, E, and R sounds that conveyed the right gameplay cue to our players. (example of design decisions on Smolder: Q sounds more powerful with more stacks, E missiles aren't his main source of damage, so I made the missile hits way less louder than his AA's or Q's, and R is a stereo dragon that plays from off screen)
Ultimately, Do the Job that you want to do; If you don't know what your dream job would be, it's your job to figure out what that is until you get there. Ask devs (like me!) what goes on in their day to day life, and once you've got a good sense of what you need to do, try doing their job with the tools that you have. Eventually, you'll have built up a portfolio of redesigns, and one day you may be able to see a new job posting, and apply with your portfolio.
Keep shining your sound design skills by doing redesigns. Whatever it is, just keep making sounds through new plugins, or taking old sounds and processing them in many different ways. Play other games, watch movies, and if you come across sounds that you really like, try to recreate them on your own time. Also, you have to check out Powerup Audio's Reel Talk on Twitch. It's a live portfolio review stream from Powerup Audio. It's an invaluable resource to all sound designers in the games industry, I'd highly recommend watching a few of other people's reels from there to understand how to create a reel and apply for jobs.
Hopefully that helps!
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