Hmmmm…this is like jumping in the deep end …in a hessian bag,with 20kg dumb bell…and hand cuffs. 
Not to dissuade you but I would take a step back. The big issue you will have is lack of nuance for frame design. Suspension frames ahve a lot going that are details that don’t seem obvious at first but have huge impact on the outcome.
This would be my advice as a way of encouragement to start but also temper the expectations. This will be an exercise in patience and learning.
There are four main areas you will need to gain an understanding, especially if those topics are new to you.
Materials
Fabrication
Geometry
Suspension.
They can be broken down into lots of sub areas.
You’ll need to research materials. Pro’s and con’s of each and the merits of chossing a material. This ties in with fabrication because what resources and skills you have or willing to learn will determine what you use.
Geometry will require you to learn how each paramter has a flow on affect to the handling, ride and total package resultant. There is never a one size fits all and will tie back to material and fabrication in being able to achieve the geometry and architecture of the bike.
Finally the suspension design will determine the architecture which will have a bearing on geo and vice versa which will go a long way to deciding on materials and fabrication methods. The four bar is realatively easy to understand and tune and provides a great platform to design from. Go and read all the articles you can find on suspension. Get onto the Vorsprung website and read their notes on suspension. Get Linkage and sit and play with the layouts and tweak it until you have a feel for what changes you can make and what affect it has on teh kinematics.
Then you need to be able to draw or model it all up. BikeCAD is great for non suspension frames, same with RattleCAD. You can sit and tweak the numbers and see how it affects the whole package and start to gain some understanding. Though you need to have a good feel for what makes a good handling bike.
If you are doing a suspension bike then CAD is going to be your friend more than you’ll know. Learn Fusion 360 if you haven’t already. Get good at it.
Last bit of advice. Ignore trying to doing some thingh really cool and out there. Just stick with the proven concepts for the first one. Copy an existing bike for geo and layout and be prepared to spend many times more to make the bike than it would cost you to just buy it in the first place.
Like I said, definitely have a go but have your eyes wide open. It will be hard and costly. Have fun.
